Correspondence map
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John Frederick William Herschel
Charles Babbage
Charles Babbage, John Frederick William Herschel and George Peacock found the Analytical Society
3 March 1812
John Frederick William Herschel presents his first scientific paper
12 November 1812:
John Frederick William Herschel communicates a paper on Cote’s theorem to the Royal Society

Autograph letter signed by sender. Sending an equation in calculus for him to give opinion.
20 June 1812 Sender: Charles Babbage Reference number: HS/2/1
Autograph letter signed by sender. Answer to Charles Babbage's equation. Bring something to discuss at the forthcoming meeting of the Analytical Society.
1 July 1812 Sender: John Frederick William Herschel Reference number: HS/2/2
Autograph letter signed by sender. Further comments on his original query [see Charles Babbage's 1812-6-20] regarding the equation in calculus.
10 July 1812 Sender: Charles Babbage Reference number: HS/2/3
Autograph letter signed by sender. Further comment on the calculus equation sent by Charles Babbage.
14 August 1812 Sender: John Frederick William Herschel Reference number: HS/2/4
Autograph letter signed by sender. Sending details of some new theorems he has come across.
22 December 1812 Sender: Charles Babbage Reference number: HS/2/5
Autograph letter signed by sender. Giving equations.
August 1812 Sender: John Frederick William Herschel Reference number: HS/2/358
Autograph letter signed by sender. Copy formula and send it to [Richard?] Taylor.
Sender: John Frederick William Herschel Reference number: HS/2/359
Draft letter. Regarding equational problems.
1812 ? Sender: John Frederick William Herschel Reference number: HS/2/360
Autograph letter signed by sender. Finding it difficult to finish his memoir. Gives some integral equations for his comments. Hopes to see him at Slough soon.
1812 ? Sender: John Frederick William Herschel Reference number: HS/2/361
Copy of letter, copied as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. Answer to Charles Babbage's equation. Bring something to discuss at the forthcoming meeting of the Analytical Society.
1 July 1812 Sender: John Frederick William Herschel Reference number: HS/20/1
Copy of letter, copied as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. Further comment on the calculus equation sent by Charles Babbage.
14 August 1812 Sender: John Frederick William Herschel Reference number: HS/20/2
Copy of a letter. Sends on part of letter for Charles Babbage to complete and forward.
1812 Sender: John Frederick William Herschel Reference number: HS/20/3
Copy of a letter. About the mathematical formulation for the summation of any series.
1812-8 Sender: John Frederick William Herschel Reference number: HS/20/4John Frederick William Herschel graduates Senior Wrangler at St John’s College, Cambridge
1813
John Frederick William Herschel is elected Fellow of the Royal Society
27 May 1813

Autograph letter signed by sender. Regarding the equations in his memoir on the series of tangents. Queries about the Analytical Society.
8 February 1813 Sender: John Frederick William Herschel Reference number: HS/2/6
Autograph letter signed by sender. Answers to John Frederick William Herschel's questions on equations. Regarding the printing of his memoirs. Recent meeting of the Analytical Society.
19 February 1813 Sender: Charles Babbage Reference number: HS/2/7
Autograph letter signed by sender. Further equations discussed. Has purchased more books. Regarding the printing of the memoir. [Letter continued on 1813-3-2.]
25 February 1813 Sender: John Frederick William Herschel Reference number: HS/2/8
Autograph letter signed by sender. Comments regarding the preface to their memoir. Further comments on John Frederick William Herschel's equations.
April 1813 Sender: Charles Babbage Reference number: HS/2/9
Autograph letter signed by sender. Memoir is being printed. Gives some more strange theorems for John Frederick William Herschel's comments.
1 May 1813 Sender: Charles Babbage Reference number: HS/2/10
Autograph letter signed by sender. Regarding his memoir: would like to see part of Charles Babbage's notes.
4 May 1813 Sender: John Frederick William Herschel Reference number: HS/2/11
Autograph letter signed by sender. Is sending copy of part of the memoir requested by John Frederick William Herschel. Gives a further theorem for John Frederick William Herschel's consideration.
25 May 1813 Sender: Charles Babbage Reference number: HS/2/12
Autograph letter signed by sender. Is sending the first 12 pages of John Frederick William Herschel's memoir. Is glad to hear that he has material for a further memoir. Gives equations for John Frederick William Herschel's comments.
1 June 1813 Sender: Charles Babbage Reference number: HS/2/13
Autograph letter signed by sender. Further regarding theorems recently discussed. Regarding the preface for John Frederick William Herschel's and Charles Babbage's Memoirs of the Analytical Society.
27 June 1813 Sender: John Frederick William Herschel Reference number: HS/2/14
Autograph letter signed by sender. Where to find further information on functional equations. Gives further equations for John Frederick William Herschel's comments. Regarding the proposed abridgement of J. B. Delambre's work on astronomy.
30 June 1813 Sender: Charles Babbage Reference number: HS/2/15
Autograph letter signed by sender. Regarding his new researches into the theory of determining functions from given conditions. The printing of his memoir is proceeding slowly.
25 July 1813 Sender: John Frederick William Herschel Reference number: HS/2/16
Autographed letter, incomplete. Has been to London and procured the books mentioned by Charles Babbage. Mentions differential equations of P. S. Laplace. Regarding some of Charles Babbage's theorems. Problem of law of chance. Printing of his memoir.
16 August 1813 Sender: John Frederick William Herschel Reference number: HS/2/17
Autograph letter signed by sender. Will be visiting London shortly and hopes to purchase some experimental equipment to carry out experiments with heat.
24 September 1813 Sender: Charles Babbage Reference number: HS/2/18
Autograph letter signed by sender. Would like to see him as soon as possible so they can prepare the preface of their memoir for the printer.
13 October 1813 Sender: John Frederick William Herschel Reference number: HS/2/19
Copy of letter, copied as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. Regarding the equations in his memoir on the series of tangents. Queries about the Analytical Society.
8 February 1813 Sender: John Frederick William Herschel Reference number: HS/20/5
Copy of letter, copied as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. Further equations discussed. Has purchased more books. Regarding the printing of the memoir. [Letter continued on 1813-3-2.]
25 February 1813 Sender: John Frederick William Herschel Reference number: HS/20/6
Copy of letter, copied as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. Endeavours to find a rapidly converging series for obtaining π. Finds anonymous papers in the early [Philosophical] Transactions.
25 February 1813 Sender: John Frederick William Herschel Reference number: HS/20/7
Copy of letter, copied as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. Regarding his memoir: would like to see part of Charles Babbage's notes.
4 May 1813 Sender: John Frederick William Herschel Reference number: HS/20/8
Copy of letter, copied as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. Further regarding theorems recently discussed. Regarding the preface for John Frederick William Herschel's and Charles Babbage's Memoirs of the Analytical Society.
27 June 1813 Sender: John Frederick William Herschel Reference number: HS/20/9
Copy of letter, copied as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. Regarding his new researches into the theory of determining functions from given conditions. The printing of his memoir is proceeding slowly.
25 July 1813 Sender: John Frederick William Herschel Reference number: HS/20/10
Copy of incomplete letter, copied as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. Has been to London and procured the books mentioned by Charles Babbage. Mentions differential equations of P. S. Laplace. Regarding some of Charles Babbage's theorems. Problem of law of chance. Printing of his memoir.
16 August 1813 Sender: John Frederick William Herschel Reference number: HS/20/11
Copy of a letter, incomplete. Sends a number of theorems and integrals.
1813-9 Sender: John Frederick William Herschel Reference number: HS/20/12
Copy of letter, copied as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. Would like to see him as soon as possible so they can prepare the preface of their memoir for the printer.
13 October 1813 Sender: John Frederick William Herschel Reference number: HS/20/13
Copy of a letter. Orders equipment from London through Charles Babbage.
1813-9-24 or later Sender: John Frederick William Herschel Reference number: HS/20/14
Autographed letter, incomplete. Has had the bill for the printing of their memoir. Ways of raising money to pay for the printing. Comments on one of Charles Babbage's equations. Will be entering Lincoln's Inn in a week's time.
12 January 1814 Sender: John Frederick William Herschel Reference number: HS/2/20
Autograph letter signed by sender. Regarding the proposed method of raising funds to pay for printing of the memoir. Justifies his equation queried by John Frederick William Herschel. Would he purchase certain chemicals for him.
21 January 1814 Sender: Charles Babbage Reference number: HS/2/21
Autograph letter signed by sender. Is sending chemicals. Regarding Humphry Davy's experiments with azotane. Davy's paper on iodine.
26 January 1814 Sender: John Frederick William Herschel Reference number: HS/2/22
Autograph letter signed by sender. Will be in town and requests addresses of shops where certain experimental apparatus can be purchased. Send [H. E.?] Roscoe's direction.
April 1814 Sender: Charles Babbage Reference number: HS/2/23
Autograph letter signed by sender. Has been working on analysis. Gives equations he has solved. Has met a mineralogist.
4 July 1814 Sender: Charles Babbage Reference number: HS/2/24
Autograph letter signed by sender. Their 'Analytical' has not been reviewed in the Edinburgh Review. Has married. Looking out for a situation. Gives an equation dealing with relative functions.
1 August 1814 Sender: Charles Babbage Reference number: HS/2/25
Autograph letter signed by sender. Comments on the equation sent by Charles Babbage. Has been experimenting with potassium.
4 August 1814 Sender: John Frederick William Herschel Reference number: HS/2/26
Autograph letter signed by sender. Sends equations in operational calculus.
August 1814 Sender: Charles Babbage Reference number: HS/2/27
Autograph letter signed by sender. Regarding Charles Babbage's marriage. Possibility of a suitable situation for him.
7 August 1814 Sender: John Frederick William Herschel Reference number: HS/2/28
Autograph letter signed by sender. Temper and stinginess of Charles Babbage's father. Seeking job in mining through Mr. Champernowne, local mineralogist. Describes Charles Babbage's elopement, marriage by former tutor, and new residence. Considered career in Church when Charles Babbage had prospect of inheriting fortune from Charles Babbage's father, but that is no longer possible. Gives an equation for discussion.
10 August 1814 Sender: Charles Babbage Reference number: HS/2/29
Autographed letter, incomplete. Gratitude for Charles Babbage's friendship. Chemical supplies and instruments. Describes synthesis of 'Sulphurane' [S2Cl2] and other experiments. Theories of combustion and acids. [Letter continued on 1813-9-21:] John Frederick William Herschel avidly studying law, against father's wishes.
20 September 1814 Sender: John Frederick William Herschel Reference number: HS/2/30
Autograph letter signed by sender. Praising Charles Babbage's functional equations. How to become an F.R.S. Conditions at Slough. Hears that he is coming to live in London.
25 October 1814 Sender: John Frederick William Herschel Reference number: HS/2/31
Autograph letter signed by sender. Thanking him for the paper on analysis. Has been to see Sir Joseph Banks. Hopes to see John Frederick William Herschel soon.
14 November 1814 Sender: Charles Babbage Reference number: HS/2/32
Autograph letter signed by sender. Has executed all of Charles Babbage's commissions. Hopes to meet Charles Shadwell when in town. Is in the throes of exams. Thinking of taking up mathematics. Relates further chemical experiments.
November 1814 Sender: John Frederick William Herschel Reference number: HS/2/33
Autograph letter signed by sender. Why hasn't he written? Further regarding Charles Shadwell's advice. Is preparing his paper on functions so that John Frederick William Herschel or William Herschel can communicate it to the Royal Society [of London]
12 December 1814 Sender: Charles Babbage Reference number: HS/2/34
Copy of incomplete letter, copied as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. Has had the bill for the printing of their memoir. Ways of raising money to pay for the printing. Comments on one of Charles Babbage's equations. Will be entering Lincoln's Inn in a week's time.
12 January 1814 Sender: John Frederick William Herschel Reference number: HS/20/15
Copy of letter, copied as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. Is sending chemicals. Regarding Humphry Davy's experiments with azotane. Davy's paper on iodine.
26 January 1814 Sender: John Frederick William Herschel Reference number: HS/20/16
Copy of letter, copied as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. Comments on the equation sent by Charles Babbage. Has been experimenting with potassium.
4 August 1814 Sender: John Frederick William Herschel Reference number: HS/20/17
Copy of letter, copied as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. Regarding Charles Babbage's marriage. Possibility of a suitable situation for him.
7 August 1814 Sender: John Frederick William Herschel Reference number: HS/20/18
Copy of incomplete letter, copied as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. Gratitude for Charles Babbage's friendship. Chemical supplies and instruments. Describes synthesis of 'Sulphurane' [S2Cl2] and other experiments. Theories of combustion and acids. [Letter continued on 1813-9-21:] John Frederick William Herschel avidly studying law, against father's wishes.
20 September 1814 Sender: John Frederick William Herschel Reference number: HS/20/19
Copy of letter, copied as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. Praising Charles Babbage's functional equations. How to become an F.R.S. Conditions at Slough. Hears that he is coming to live in London.
25 October 1814 Sender: John Frederick William Herschel Reference number: HS/20/20
Copy of letter, copied as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. Has executed all of Charles Babbage's commissions. Hopes to meet Charles Shadwell when in town. Is in the throes of exams. Thinking of taking up mathematics. Relates further chemical experiments.
1814-11 Sender: John Frederick William Herschel Reference number: HS/20/21John Frederick William Herschel begins as sub-lector at St. John's College, Cambridge
1 May 1815

Autograph letter signed by sender. Explaining his new theory of the atmospheres of the sun, planets, and stars.
11 February 1815 Sender: Charles Babbage Reference number: HS/2/35
Autograph letter signed by sender. Regarding Charles Babbage's theory of the atmosphere of the sun, planets, and stars.
16 February 1815 Sender: John Frederick William Herschel Reference number: HS/2/36
Autograph letter signed by sender. Regarding the vacant post of Professor of Chemistry at Cambridge. Has heard that the works of Leonhard Euler are being reprinted. Would he obtain the return of one of Charles Babbage's books from Mr. Higman.
15 March 1815 Sender: Charles Babbage Reference number: HS/2/37
Autograph letter signed by sender. Regarding the vacant professorship of chemistry at Cambridge. Recent chemical experiments. Has obtained the book from Mr. Higman. Mr. Pulling was here recently.
23 March 1815 Sender: John Frederick William Herschel Reference number: HS/2/38
Autograph letter signed by sender. Hopes to call on him Monday. Is just off to Brighton for medical reasons. Will return to Cambridge later.
10 September 1815 Sender: John Frederick William Herschel Reference number: HS/2/39
Autograph letter signed by sender. Idling time at Brighton. Gives equations for Charles Babbage to study. Regarding the equipment he needs for experiments. Will not be able to return to professional activities for some time.
25 September 1815 Sender: John Frederick William Herschel Reference number: HS/2/40
Autograph letter signed by sender. Is sending a problem in analysis for his comments. Gives solution to functional equations of the second degree. Hopes to see him when he passes on his way to Cambridge.
25 September 1815 Sender: Charles Babbage Reference number: HS/2/41
Autographed letter . Answer regarding Charles Babbage's problem in analysis. Will visit him soon. Getting apparatus ready to be moved to Cambridge.
7 October 1815 Sender: John Frederick William Herschel Reference number: HS/2/42
Autograph letter signed by sender. Wished John Frederick William Herschel had visited him when in London. Gives some functional equations for his comments. Wants a form in order that he (Charles Babbage) may be elected to the Royal Society [of London]
28 October 1815 Sender: Charles Babbage Reference number: HS/2/43
Autographed letter, incomplete. Reasons why he could not visit him when in London. Gives views on a paper of Charles Babbage's. Fears he must give up the profession.
6 November 1815 Sender: John Frederick William Herschel Reference number: HS/2/44
Autograph letter signed by sender. Regarding his own functional theories. Let him know when next in town.
9 November 1815 Sender: Charles Babbage Reference number: HS/2/45
Autograph letter signed by sender. Newman has sent the apparatus. Problems in calculus.
13 November 1815 Sender: Charles Babbage Reference number: HS/2/46
Autograph letter signed by sender. Giving form for recommendation to be elected to the fellowship of the Royal Society [of London] Has been offered space in a magazine for reviewing mathematical subjects. Suggesting anonymous work on analytics by him or John Frederick William Herschel.
15 November 1815 Sender: Charles Babbage Reference number: HS/2/47
Autograph letter signed by sender. Asking him to get certificate signed for his election to the Royal Society [of London] Has had no time for mathematics recently. Will be prepared to write anonymous article against analysists.
20 November 1815 Sender: John Frederick William Herschel Reference number: HS/2/48
Autograph letter signed by sender. Soon leaving for a short visit to Devon. Hopes he will call when passing through London. New means of preventing explosions in mines. Gives an equation for John Frederick William Herschel's comments.
8 December 1815 Sender: Charles Babbage Reference number: HS/2/50
Autograph letter signed by sender. Is in the midst of examining. Will call when in town this week. Has done nothing in analysis lately.
18 December 1815 Sender: John Frederick William Herschel Reference number: HS/2/51
Autograph letter signed by sender. Will see him on Thursday. Has paper ready for the Royal Society [of London]
18 December 1815 Sender: Charles Babbage Reference number: HS/2/52
Autograph letter signed by sender. Sending problems in functional analysis. Please send his manuscript on functions to Devonshire Place.
28 December 1815 Sender: Charles Babbage Reference number: HS/2/53
Copy of letter, copied as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. Regarding Charles Babbage's theory of the atmosphere of the sun, planets, and stars.
16 February 1815 Sender: John Frederick William Herschel Reference number: HS/20/22
Copy of letter, copied as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. Regarding the vacant professorship of chemistry at Cambridge. Recent chemical experiments. Has obtained the book from Mr. Higman. Mr. Pulling was here recently.
23 March 1815 Sender: John Frederick William Herschel Reference number: HS/20/23
Copy of letter, copied as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. Hopes to call on him Monday. Is just off to Brighton for medical reasons. Will return to Cambridge later.
10 September 1815 Sender: John Frederick William Herschel Reference number: HS/20/24
Copy of letter, copied as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. Idling time at Brighton. Gives equations for Charles Babbage to study. Regarding the equipment he needs for experiments. Will not be able to return to professional activities for some time.
25 September 1815 Sender: John Frederick William Herschel Reference number: HS/20/26
Copy of letter, copied as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. Answer regarding Charles Babbage's problem in analysis. Will visit him soon. Getting apparatus ready to be moved to Cambridge.
7 October 1815 Sender: John Frederick William Herschel Reference number: HS/20/27
Copy of incomplete letter, copied as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. Reasons why he could not visit him when in London. Gives views on a paper of Charles Babbage's. Fears he must give up the profession.
6 November 1815 Sender: John Frederick William Herschel Reference number: HS/20/28
Copy of a letter. Supports Charles Babbage for membership in Royal Society [of London] Little time recently for mathematics, but is quite upset with analysts.
22 November 1815 Sender: John Frederick William Herschel Reference number: HS/20/29
Copy of letter, copied as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. Is in the midst of examining. Will call when in town this week. Has done nothing in analysis lately.
18 December 1815 Sender: John Frederick William Herschel Reference number: HS/20/30John Frederick William Herschel is awarded Master of Arts (MA), at the University of Cambridge
30 January 1816
John Frederick William Herschel starts astronomical work alongside his father Sir William Herschel FRS
1816

Autograph letter signed by sender. Does not have Charles Babbage's manuscript on functions in his possession. Regarding the translations of S. F. Lacroix. Has done no work while at home.
6 January 1816 Sender: John Frederick William Herschel Reference number: HS/2/54
Autograph letter signed by sender. Is sorry that Charles Babbage's paper could not be printed in the recent issue of the Philosophical Transactions of the Royal Society Discusses problem in analysis. [Note dated [1816-]2-7]: has been waiting for Mr. Deighton's estimate of printing.
7 February 1816 Sender: John Frederick William Herschel Reference number: HS/2/55
Autograph letter signed by sender. What is he to do with his work on S. F. Lacroix. Regarding the Royal Society [of London] and the printing of Charles Babbage's paper on functions. Is sending an abridged version of this paper to John Frederick William Herschel.
21 February 1816 Sender: Charles Babbage Reference number: HS/2/56
Autograph letter signed by sender. Has received parcel and letter. Has not had much time to give attention to the manuscript yet. On the Royal Society [of London] and the printing of long papers. Hopes to have Charles Babbage's translation of S. F. Lacroix soon. Regarding one of his equations.
26 February 1816 Sender: John Frederick William Herschel Reference number: HS/2/57
Autograph letter signed by sender. Is thinking of applying for the position of Professor of Mathematics at East India College. Has written to William Herschel and others for references. George Peacock is also a candidate. Regarding functional equations.
9 March 1816 Sender: Charles Babbage Reference number: HS/2/58
Autograph letter signed by sender. Regrets he cannot assist Charles Babbage over the position at East India College. William Herschel has less influence over Sir Joseph Banks than Charles Babbage thinks. Regarding his paradoxes in functional equations.
13 March 1816 Sender: John Frederick William Herschel Reference number: HS/2/59
Autograph letter signed by sender. Regarding his application for the position of professor at East India College. Gives functional equations for John Frederick William Herschel's comments.
27 April 1816 Sender: Charles Babbage Reference number: HS/2/60
Autograph letter signed by sender. Sorry he has had all the trouble with Charles Babbage's translation. Father is ill. Will move shortly to Torquay. Regarding the printing of mathematical notations.
June 1816 Sender: Charles Babbage Reference number: HS/2/61
Autograph letter signed by sender. Regarding his translation of S. F. Lacroix. Regarding the notation of functions.
9 June 1816 Sender: Charles Babbage Reference number: HS/2/62
Autograph letter signed by sender. Is sending his paper on functions. Gives some functional equations and their solutions. Will be staying at Torquay until September.
10 July 1816 Sender: Charles Babbage Reference number: HS/2/63
Autograph letter signed by sender. Has had little leisure to write. Been working on S. F. Lacroix. Regarding the appendix to Lacroix. Is going to the Isle of Wight. Hopes to write a work on analytics. Has heard that Charles Babbage is writing articles for the journal of the Royal Institution. Would like to write articles for an encyclopaedia.
14 July 1816 Sender: John Frederick William Herschel Reference number: HS/2/64
Autograph letter signed by sender. Regarding John Frederick William Herschel's plans for the third part of S. F. Lacroix. Royal Institution and Charles Babbage's articles for their journal. Hopes that John Frederick William Herschel will not write his book on Newton yet. Is hoping to publish a work on the Calculus of Functions. Hopes to meet him when in Devon.
20 July 1816 Sender: Charles Babbage Reference number: HS/2/65
Autograph letter signed by sender. Is glad to hear that he will be coming to Torquay. Regarding his new method of solving functions.
August 1816 Sender: Charles Babbage Reference number: HS/2/66
Autograph letter signed by sender. Temporarily at Bridgenorth as his wife's father has died. Must delay his visit to London. Has been interesting his brother-in-law in gas lights.
27 September 1816 Sender: Charles Babbage Reference number: HS/2/67
Autograph letter signed by sender. Leaving Cambridge shortly, probably for good. Will be under his father's directions observing the stars. Has sent the appendix to S. F. Lacroix. Regarding John Frederick William Herschel's error in the printing of an equation. Gives an equation for Charles Babbage to comment on.
10 October 1816 Sender: John Frederick William Herschel Reference number: HS/2/68
Autograph letter signed by sender. Has received a copy of their book. Sending a copy of his own paper printed in the Philosophical Transactions of the Royal Society Has prepared the way for Charles Babbage's book on examples. Has been examining [John?] Spence's manuscript.
24 December 1816 Sender: John Frederick William Herschel Reference number: HS/2/69
Copy of letter, copied as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. Does not have Charles Babbage's manuscript on functions in his possession. Regarding the translations of S. F. Lacroix. Has done no work while at home.
6 January 1816 Sender: John Frederick William Herschel Reference number: HS/20/31
Copy of letter, copied as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. Is sorry that Charles Babbage's paper could not be printed in the recent issue of the Philosophical Transactions of the Royal Society Discusses problem in analysis. [Note dated [1816-]2-7]: has been waiting for Mr. Deighton's estimate of printing.
7 February 1816 Sender: John Frederick William Herschel Reference number: HS/20/32
Copy of letter, copied as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. Has received parcel and letter. Has not had much time to give attention to the manuscript yet. On the Royal Society [of London] and the printing of long papers. Hopes to have Charles Babbage's translation of S. F. Lacroix soon. Regarding one of his equations.
26 February 1816 Sender: John Frederick William Herschel Reference number: HS/20/33
Copy of letter, copied as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. Regrets he cannot assist Charles Babbage over the position at East India College. William Herschel has less influence over Sir Joseph Banks than Charles Babbage thinks. Regarding his paradoxes in functional equations.
13 March 1816 Sender: John Frederick William Herschel Reference number: HS/20/34
Copy of letter, copied as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. Has had little leisure to write. Been working on S. F. Lacroix. Regarding the appendix to Lacroix. Is going to the Isle of Wight. Hopes to write a work on analytics. Has heard that Charles Babbage is writing articles for the journal of the Royal Institution. Would like to write articles for an encyclopaedia.
14 July 1816 Sender: John Frederick William Herschel Reference number: HS/20/35
Copy of letter, copied as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. Leaving Cambridge shortly, probably for good. Will be under his father's directions observing the stars. Has sent the appendix to S. F. Lacroix. Regarding John Frederick William Herschel's error in the printing of an equation. Gives an equation for Charles Babbage to comment on.
10 October 1816 Sender: John Frederick William Herschel Reference number: HS/20/36
Copy of letter, copied as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. Has received a copy of their book. Sending a copy of his own paper printed in the Philosophical Transactions of the Royal Society Has prepared the way for Charles Babbage's book on examples. Has been examining [John?] Spence's manuscript.
24 December 1816 Sender: John Frederick William Herschel Reference number: HS/20/37
Autograph letter signed by sender. Regarding a possible error by John Frederick William Herschel in one of his equations [see Charles Babbage's 1816-10-10]. Proposes a plan for a new work on analysis.
2 January 1817 Sender: Charles Babbage Reference number: HS/2/70
Autograph letter signed by sender. Will be coming to town shortly and hopes to stay with Charles Babbage if possible. They must get another volume of the transactions of the Analytical Society out.
30 January 1817 Sender: John Frederick William Herschel Reference number: HS/2/71
Autograph letter signed by sender. Is glad John Frederick William Herschel is coming to town. Another son born. They must revive the Analytical. Explains a problem in functional analysis.
30 January 1817 Sender: Charles Babbage Reference number: HS/2/72
Autograph letter signed by sender. Has sent letters in a parcel. Regarding functional equations of the first order.
17 February 1817 Sender: Charles Babbage Reference number: HS/2/73
Autograph letter signed by sender. Note to the effect that Dr. William Clarke of Trinity is a candidate for the Professorship of Anatomy. Hopes John Frederick William Herschel will support the Dr. [This letter is an appendix to Charles Babbage's 1817-2-17]
17 February 1817 Sender: Charles Babbage Reference number: HS/2/74
Autograph letter signed by sender. Will send part of John Frederick William Herschel's manuscript and Hirsh's book. Has introduced E. F. Bromhead to the Royal Society [of London]'s club and Sir Joseph Banks. Is about to draw up a sketch of the history of functions.
27 February 1817 Sender: Charles Babbage Reference number: HS/2/75
Autograph letter signed by sender. Encloses one of E. F. Bromhead's papers. Has collected all his letters relating to functions. Has he a copy of his paper 'Solutions...'? Regarding the properties of curves. His scheme for symmetrizing all functions.
29 March 1817 Sender: Charles Babbage Reference number: HS/2/76
Autograph letter signed by sender. Will go down to Cambridge to vote for William Clarke. Equation problem. Enquiry regarding paper on factorials by [Peter] Nic[h]olson. Regarding errors made by Clarke in his papers.
31 March 1817 Sender: John Frederick William Herschel Reference number: HS/2/77
Autograph letter signed by sender. Is sending Charles Babbage all his letters dealing with functional equations. Comments on E. F. Bromhead's paper. Taylor's theorem. Is getting on well with his essay on exponential functions.
3 April 1817 Sender: John Frederick William Herschel Reference number: HS/2/78
Autographed letter . Is returning E. F. Bromhead's paper. Matters are arising from this paper. Encloses one of his own dealing with the notation of functions. When should he set off to Cambridge to vote for William Clarke?
16 April 1817 Sender: John Frederick William Herschel Reference number: HS/2/79
Autograph letter signed by sender. Has been to Cambridge. Regarding John Frederick William Herschel's paper dealing with notation. Has been working on his history of functions.
12 May 1817 Sender: Charles Babbage Reference number: HS/2/80
Autograph letter signed by sender. Will see him in London. Is getting on with his supplement. Has seen Charles Babbage's latest paper in the Philosophical Transactions of the Royal Society Regarding Mr. Hirsch's theories on equations. Includes a riddle which "contains a great discovery" and doodle of Dionysius the God of Function".
15 May 1817 Sender: John Frederick William Herschel Reference number: HS/2/81
Autograph letter signed by sender. Come on Friday to meet E. F. Bromhead and discuss notation.
28 May 1817 Sender: Charles Babbage Reference number: HS/2/82
Autograph letter signed by sender. Has been trying his hand at functions; quotes some. Hopes to visit him at Torquay. Push on with the supplement.
1 August 1817 Sender: John Frederick William Herschel Reference number: HS/2/83
Autograph letter signed by sender. Is glad to hear he will be visiting Torquay. Regarding mathematical functions.
6 August 1817 Sender: Charles Babbage Reference number: HS/2/84
Autograph letter signed by sender. Regarding the calculus of derivations.
18 August 1817 Sender: Charles Babbage Reference number: HS/2/85
Autograph letter signed by sender. Regarding his projected supplement. Calculus of deviations. Naming of periodical functions. [John?] Spence's manuscript.
3 October 1817 Sender: John Frederick William Herschel Reference number: HS/2/86
Autograph letter signed by sender. Hopes to visit him in a few days. Regarding the calculus of derivations. Periodic functions. Is taking up mineralogy.
22 October 1817 Sender: Charles Babbage Reference number: HS/2/87
Autograph letter signed by sender. Regarding mathematical examples for their forthcoming book. Is taking up chemistry again. Comments on a paper dealing with functional equations by W. G. Horner.
11 November 1817 Sender: Charles Babbage Reference number: HS/2/88
Autograph letter signed by sender. Regarding W. G. Horner's paper. Printing of their book. Is preparing a paper to submit to the Royal Society [of London] on a mathematical subject. Will be in town shortly and will visit his laboratory. Has received more sheets of [John?] Spence's essays.
24 November 1817 Sender: John Frederick William Herschel Reference number: HS/2/89
Copy of letter, copied as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. Will be coming to town shortly and hopes to stay with Charles Babbage if possible. They must get another volume of the transactions of the Analytical Society out.
30 January 1817 Sender: John Frederick William Herschel Reference number: HS/20/38
Copy of letter, copied as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. Will go down to Cambridge to vote for William Clarke. Equation problem. Enquiry regarding paper on factorials by [Peter] Nic[h]olson. Regarding errors made by Clarke in his papers.
31 March 1817 Sender: John Frederick William Herschel Reference number: HS/20/40
Copy of letter, copied as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. Is sending Charles Babbage all his letters dealing with functional equations. Comments on E. F. Bromhead's paper. Taylor's theorem. Is getting on well with his essay on exponential functions.
3 April 1817 Sender: John Frederick William Herschel Reference number: HS/20/41
Copy of letter, copied as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. Is returning E. F. Bromhead's paper. Matters are arising from this paper. Encloses one of his own dealing with the notation of functions. When should he set off to Cambridge to vote for William Clarke?
16 April 1817 Sender: John Frederick William Herschel Reference number: HS/20/42
Copy of letter, copied as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. Will see him in London. Is getting on with his supplement. Has seen Charles Babbage's latest paper in the Philosophical Transactions of the Royal Society Regarding Mr. Hirsch's theories on equations.
15 May 1817 Sender: John Frederick William Herschel Reference number: HS/20/43
Copy of letter, copied as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. Has been trying his hand at functions; quotes some. Hopes to visit him at Torquay. Push on with the supplement.
1 August 1817 Sender: John Frederick William Herschel Reference number: HS/20/47
Copy of letter, copied as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. Regarding his projected supplement. Calculus of deviations. Naming of periodical functions. [John?] Spence's manuscript.
3 October 1817 Sender: John Frederick William Herschel Reference number: HS/20/49
Copy of letter, copied as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. Regarding W. G. Horner's paper. Printing of their book. Is preparing a paper to submit to the Royal Society [of London] on a mathematical subject. Will be in town shortly and will visit his laboratory. Has received more sheets of [John?] Spence's essays.
24 November 1817 Sender: John Frederick William Herschel Reference number: HS/20/51Mary Shelley publishes Frankenstein, or the Modern Prometheus
1818

Autograph letter signed by sender. Would like comments on the accompanying paper on functional equations. Stephen Lee [of the Royal Society [of London]] has revived the reading of Isaac Newton in Paris.
10 March 1818 Sender: John Frederick William Herschel Reference number: HS/2/90
Autograph letter signed by sender. Comments on his paper sent previously [see John Frederick William Herschel's 1818-3-10]. Time has been taken up with mineralogy. Is sending some samples.
16 March 1818 Sender: Charles Babbage Reference number: HS/2/91
Autograph letter signed by sender. Please send the third volume of J. E. Montucla's Histoire de mathématiques. Is running into difficulties with his history of mathematics owing to lack of translations. Regarding kaleidoscopes. Has been reading David Brewster's experiments on Mother of pearl.
26 April 1818 Sender: John Frederick William Herschel Reference number: HS/2/92
Autograph letter signed by sender. Cannot help him with the Commercium epistolicum [by Pierre Fermat]. Leaving town for a few days. Regarding the kaleidoscope.
April 1818 Sender: Charles Babbage Reference number: HS/2/93
Autograph letter signed by sender. Thanking him for the third volume of J. E. Montucla's Histoire de mathématiques. Gives functional equations for his comments. Is afraid that he will not be able to visit Cornwall this summer.
16 May 1818 Sender: John Frederick William Herschel Reference number: HS/2/94
Autograph letter signed by sender. Wishes to leave town and spend a few weeks in Torquay. Would John Frederick William Herschel join him? Has new theorem on functions.
24 July 1818 Sender: Charles Babbage Reference number: HS/2/95
Autograph letter signed by sender. Gives some analytical equations for his comments.
13 October 1818 Sender: Charles Babbage Reference number: HS/2/96
Autographed letter, incomplete. Welcome back to London. Explain Charles Babbage's demonstration of 'theorem in transcendental arithmetic.' John Frederick William Herschel's observations of 'new acid' [hyposulfurous] and optical phenomena in 'chrystals of nitre.'
9 November 1818 Sender: John Frederick William Herschel Reference number: HS/2/97
Autograph letter signed by sender. Wants his support for his own application for a post on the Board of Longitude.
10 November 1818 Sender: Charles Babbage Reference number: HS/2/98
Autograph letter signed by sender. When he comes up to town would he please bring Biot's work. Wants to show John Frederick William Herschel a paper on series. Has just had a visit from Edward Sabine, newly returned from Greenland.
26 November 1818 Sender: Charles Babbage Reference number: HS/2/99
Autograph letter signed by sender. Astronomer Royal's post at Greenwich vacant; hopes John Frederick William Herschel will try for it. Has not been successful in getting on the Board of Longitude. Hopes to spend a fortnight in Paris after Christmas.
1 December 1818 Sender: Charles Babbage Reference number: HS/2/100
Autograph letter signed by sender. Thanks Charles Babbage for his advice about applying for the post of Astronomer Royal when it becomes vacant, but does not think himself qualified. Will not be able to come to London this weekend. Regarding his new acid.
2 December 1818 Sender: John Frederick William Herschel Reference number: HS/2/101
Autograph letter signed by sender. Urges John Frederick William Herschel to apply for the Greenwich post. Quotes extract from Thomas Thomson on chemistry. Gives equations for his comments. Has found a new method of producing household gas.
4 December 1818 Sender: Charles Babbage Reference number: HS/2/102
Autograph letter signed by sender. Thanking Charles Babbage for Charles Babbage's further remarks on the Greenwich post. Further regarding his new acid.
6 December 1818 Sender: John Frederick William Herschel Reference number: HS/2/103
Autograph letter signed by sender. Remarks on Charles Babbage's article on analysis and the examples used. Hopes to see him at Christmas; then they can talk about the projected visit to Paris.
12 December 1818 Sender: John Frederick William Herschel Reference number: HS/2/104
Autograph letter signed by sender. Regarding one of John Frederick William Herschel's papers in the Analytical. P.S. dated 19 Dec.: Is glad to hear he would like to go to Paris.
16 December 1818 Sender: Charles Babbage Reference number: HS/2/105
Autograph letter signed by sender. Hopes Charles Babbage will visit Slough soon to discuss the proposed trip to Paris. Gives a sketch of his investigations on theorems connected with series.
20 December 1818 Sender: John Frederick William Herschel Reference number: HS/2/106
Autograph letter signed by sender. Will visit him at Christmas. Regarding the theorem quoted by John Frederick William Herschel [see John Frederick William Herschel's 1818-12-20].
22 December 1818 Sender: Charles Babbage Reference number: HS/2/107
Copy of letter, copied as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. Would like comments on the accompanying paper on functional equations. Stephen Lee [of the Royal Society [of London]] has revived the reading of Isaac Newton in Paris.
10 March 1818 Sender: John Frederick William Herschel Reference number: HS/20/53
Copy of letter, copied as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. Please send the third volume of J. E. Montucla's Histoire de mathematiques. Is running into difficulties with his history of mathematics owing to lack of translations. Regarding kaleidoscopes. Has been reading David Brewster's experiments on Mother of pearl.
26 April 1818 Sender: John Frederick William Herschel Reference number: HS/20/54
Copy of letter, copied as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. Thanking him for the third volume of J. E. Montucla's Histoire de mathematiques. Gives functional equations for his comments. Is afraid that he will not be able to visit Cornwall this summer.
16 May 1818 Sender: John Frederick William Herschel Reference number: HS/20/55
Copy of incomplete letter, copied as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. Welcome back to London. Explain Charles Babbage's demonstration of 'theorem in transcendental arithmetic.' John Frederick William Herschel's observations of 'new acid' [hyposulfurous] and optical phenomena in 'chrystals of nitre.'
9 November 1818 Sender: John Frederick William Herschel Reference number: HS/20/57
Copy of letter, copied as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. Thanks Charles Babbage for his advice about applying for the post of Astronomer Royal when it becomes vacant, but does not think himself qualified. Will not be able to come to London this weekend. Regarding his new acid.
2 December 1818 Sender: John Frederick William Herschel Reference number: HS/20/59
Copy of letter, copied as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. Thanking Charles Babbage for Charles Babbage's further remarks on the Greenwich post. Further regarding his new acid.
6 December 1818 Sender: John Frederick William Herschel Reference number: HS/20/60
Copy of letter, copied as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. Remarks on Charles Babbage's article on analysis and the examples used. Hopes to see him at Christmas; then they can talk about the projected visit to Paris.
12 December 1818 Sender: John Frederick William Herschel Reference number: HS/20/61John Frederick William Herschel serves on the Board of Longitude
1819

Autograph letter signed by sender. Gives equation. Is arranging the visit to Paris.
7 January 1819 Sender: Charles Babbage Reference number: HS/2/108
Autograph letter signed by sender. Would he please forward the letters and papers which he left behind.
17 February 1819 Sender: John Frederick William Herschel Reference number: HS/2/109
Autograph letter signed by sender. Is anxious to hear how his wounds are progressing. Will not be able to come to town yet owing to various circumstances. New chemical experiments.
19 February 1819 Sender: John Frederick William Herschel Reference number: HS/2/110
Autograph letter signed by sender. Relates the details of his accident. Gives equations and theorems.
19 February 1819 Sender: Charles Babbage Reference number: HS/2/111
Autograph letter signed by sender. Has had some more tourmaline sent. Gives some more equations. Chemical experiments.
21 March 1819 Sender: Charles Babbage Reference number: HS/2/112
Autograph letter signed by sender. Regarding the disposal of the tourmaline. Address of his cousin. Drawing and description of the apparatus for experiments on tourmaline. Chemical experiments.
25 March 1819 Sender: John Frederick William Herschel Reference number: HS/2/113
Autograph letter signed by sender. Has dispatched the tourmaline. His chemical experiments. Circulating functions solving chance problems. [Letter postmarked 1819-3-29.]
6 March 1819 Sender: Charles Babbage Reference number: HS/2/114
Autograph letter signed by sender. Has received papers from J. B. Biot. Has been to the Customs and Excise. Functional equations.
14 April 1819 Sender: Charles Babbage Reference number: HS/2/115
Autograph letter signed by sender. Answers Charles Babbage's question on the equation. Hopes to see him in London shortly. Chemical experiments.
8 May 1819 Sender: John Frederick William Herschel Reference number: HS/2/116
Autograph letter signed by sender. Has just returned from Lincolnshire. Will shortly be visiting Torquay. Would like to call on him if convenient. Has heard of a vacant professorship at Edinburgh University and may try for it. Gives an equation of W. H. Wollaston's.
24 July 1819 Sender: Charles Babbage Reference number: HS/2/117
Autograph letter signed by sender. Is going to Edinburgh to apply for the post left vacant by John Playfair's death. Would John Frederick William Herschel and his father give him certificates and references? [Note by Mrs. Charles Babbage to the effect that her husband has heard that James Ivory will not be contesting the professorship at Edinburgh].
25 July 1819 Sender: Charles Babbage Reference number: HS/2/118
Autograph letter signed by sender. Wishing Charles Babbage success in his efforts to obtain the position of professor at Edinburgh. Relates details of his recent experiments with bicarbonate of potash.
July 1819 Sender: John Frederick William Herschel Reference number: HS/2/119
Autograph letter signed by sender. Apologizes for the long delay in answering his letter. Relates experiences and hopes of success in his effort to obtain the position of professor at the University.
8 August 1819 Sender: Charles Babbage Reference number: HS/2/120
Autograph letter signed by sender. Sorry to hear of his failure at Edinburgh. Inviting him to Slough. Enquiring about the people Charles Babbage met at Edinburgh.
September 1819 Sender: John Frederick William Herschel Reference number: HS/2/121
Autograph letter signed by sender. Has just returned from Edinburgh and found John Frederick William Herschel's letter awaiting him. Relates various experiences in Edinburgh. Recent discoveries in his chemical experiments.
13 October 1819 Sender: Charles Babbage Reference number: HS/2/122
Autograph letter signed by sender. Will not be in town until Tuesday afternoon. Has been speculating on a means of telegraphic communication between himself and Charles Babbage.
13 October 1819 Sender: John Frederick William Herschel Reference number: HS/2/123
Autograph letter signed by sender. Would he like to come for a trip down the river to see W. E. Parry's Expedition ships? Query regarding quartz crystals. Date for Pearsonian dinner.
1819 ? Sender: Charles Babbage Reference number: HS/2/340
Autograph letter signed by sender. Cannot accompany Charles Babbage to Deptford because John Frederick William Herschel busy with James South. Mentions the 'Pearsonian dinner,' 'plagi[h]edral' crystals, and a letter by Wilhelm Olbers.
1819 ? Sender: John Frederick William Herschel Reference number: HS/2/362
Autograph letter signed by sender. Bad news: a Frenchman has submitted a design for a mathematical machine.
Sender: John Frederick William Herschel Reference number: HS/2/363
Autograph letter signed by sender. Unable to attend the Astronomical Society meeting. Encloses two papers for him to deal with.
Sender: John Frederick William Herschel Reference number: HS/2/364
Copy of letter, copied as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. Would he please forward the letters and papers which he left behind.
17 February 1819 Sender: John Frederick William Herschel Reference number: HS/20/65
Copy of letter, copied as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. Is anxious to hear how his wounds are progressing. Will not be able to come to town yet owing to various circumstances. New chemical experiments.
19 February 1819 Sender: John Frederick William Herschel Reference number: HS/20/66
Copy of letter, copied as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. Cannot accompany Charles Babbage to Deptford because John Frederick William Herschel busy with James South. Mentions the 'Pearsonian dinner,' 'plagi[h]edral' crystals, and a letter by Wilhelm Olbers.
1819? Sender: John Frederick William Herschel Reference number: HS/20/67
Copy of letter, copied as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. Regarding the disposal of the tourmaline. Address of his cousin. Drawing and description of the apparatus for experiments on tourmaline. Chemical experiments.
25 March 1819 Sender: John Frederick William Herschel Reference number: HS/20/68
Copy of letter, copied as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. Answers Charles Babbage's question on the equation. Hopes to see him in London shortly. Chemical experiments.
8 May 1819 Sender: John Frederick William Herschel Reference number: HS/20/69
Copy of letter, copied as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. Wishing Charles Babbage success in his efforts to obtain the position of professor at Edinburgh. Relates details of his recent experiments with bicarbonate of potash.
1819-7 Sender: John Frederick William Herschel Reference number: HS/20/72
Copy of letter, copied as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. Sorry to hear of his failure at Edinburgh. Inviting him to Slough. Enquiring about the people Charles Babbage met at Edinburgh.
1819-9 Sender: John Frederick William Herschel Reference number: HS/20/73
Copy of letter, copied as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. Will not be in town until Tuesday afternoon. Has been speculating on a means of telegraphic communication between himself and Charles Babbage.
13 October 1819 Sender: John Frederick William Herschel Reference number: HS/20/75John Frederick William Herschel publishes in the Philosophical Transactions of the Royal Society.
1820: John Frederick William Herschel publishes “On the action of crystallized bodies on homogeneous light, and on the causes of the deviation from Newton's scale in the tints which many of them develope on exposure to a polarised ray” .
John Frederick William Herschel serves his first term as Foreign Secretary of the Royal Astronomical Society
1820

Autograph letter signed by sender. Please send instructions as to how he would like the rock crystals cut so that he can pass the instructions on to Wilson Lowry. Is sending two drawings of John Frederick William Herschel. Has heard from David Brewster that Edinburgh has established a prize like that of Benjamin Thompson (Count Rumford).
5 January 1820 Sender: Charles Babbage Reference number: HS/2/124
Autograph letter signed by sender. Would he please send back some of his papers on astronomy as he wants them in order to draw up a prospectus.
17 January 1820 Sender: John Frederick William Herschel Reference number: HS/2/125
Autograph letter signed by sender. Recent happenings and committee decisions in the Astronomical Society.
31 January 1820 Sender: Charles Babbage Reference number: HS/2/126
Autograph letter signed by sender. Regarding the forthcoming meeting of the Astronomical Society. The printing of his own address. Is preparing a paper on functional equations. Is prepared to accept the office of Foreign Secretary of the Astronomical Society.
2 February 1820 Sender: John Frederick William Herschel Reference number: HS/2/127
Autograph letter signed by sender. Has had a letter from Davies Gilbert regarding the presidency of the Astronomical Society. Possible alternatives. Gives a problem of the law of chance.
6 February 1820 Sender: Charles Babbage Reference number: HS/2/128
Autograph letter signed by sender. Was unable to attend council meeting of the Astronomical Society. Difficulties over the choosing of a president. Regarding the affairs of Sir Joseph Banks.
18 March 1820 Sender: Charles Babbage Reference number: HS/2/129
Autograph letter signed by sender. Was unable to attend the meeting of the Astronomical Society Council. Has heard the news regarding the president. Gives a problem of chance. Regarding the printing of the supplement.
19 March 1820 Sender: John Frederick William Herschel Reference number: HS/2/130
Autograph letter signed by sender. Regarding his stove for his experiments. Problem with crystals. Printing of his book in Paris.
30 March 1820 Sender: Charles Babbage Reference number: HS/2/131
Autograph letter signed by sender. Informing him of the death of Isaac Milner. He should try for the Lucasian Professorship at Cambridge.
3 April 1820 Sender: Charles Babbage Reference number: HS/2/132
Autograph letter signed by sender. Will be going to Cambridge to try for the vacant professorship. Remarks on his reasons for applying for the post. His recent experiments with quartz.
4 April 1820 Sender: John Frederick William Herschel Reference number: HS/2/133
Autograph letter signed by sender. Reasons why his father does not wish to become the president of the Astronomical Society. Has attended a meeting of the Philosophical Society. Please send three or four copies of the address of the Astronomical Society.
20 April 1820 Sender: John Frederick William Herschel Reference number: HS/2/134
Autographed letter, incomplete. No news of the Board of Longitude. Has informed Thomas Beckwith that John Frederick William Herschel will be with him on Wednesday. Gives an example in functions.
1 May 1820 Sender: Charles Babbage Reference number: HS/2/135
Autograph letter signed by sender. Regarding Prince Leopold. John Frederick William Herschel must come to town to mix with men of science. There are two vacancies on the Board of Longitude. Regarding a certain star.
22 May 1820 Sender: Charles Babbage Reference number: HS/2/136
Autograph letter signed by sender. Hopes to take up abode in his former lodgings. To what star does Charles Babbage refer to in his last letter [see Charles Babbage's 1820-5-22]?
23 May 1820 Sender: John Frederick William Herschel Reference number: HS/2/137
Autograph letter signed by sender. Has received the visitation letter. Work is progressing on the twenty-foot telescope. Hopes to leave for Devon soon. Places he would like to visit. Hopes Charles Babbage is well versed in geology.
12 July 1820 Sender: John Frederick William Herschel Reference number: HS/2/138
Autograph letter signed by sender. Humphry Davy has been canvassing. Has several Cornish introductions. Would like to visit South Wales.
July 1820 Sender: Charles Babbage Reference number: HS/2/139
Autograph letter signed by sender. Has been doing lots of chemical experiments. Gives one of his experiments with prisms. Regarding star observations.
7 August 1820 Sender: Charles Babbage Reference number: HS/2/140
Autograph letter signed by sender. Would John Frederick William Herschel send him the chemical formula for converting rags to sugar.
9 August 1820 Sender: Charles Babbage Reference number: HS/2/141
Autograph letter signed by sender. It looks as though their projected Cornish excursion will have to be postponed for a time. Gives the formula for the conversion of rags into sugar. A Finnish astronomer wishes to be elected a member of the Astronomical Society. Observations on the theory of parallax.
12 August 1820 Sender: John Frederick William Herschel Reference number: HS/2/142
Autograph letter signed by sender. Has returned from his holiday. Thanks for the chemical periodicals. Has evolved some new schemes.
21 October 1820 Sender: Charles Babbage Reference number: HS/2/143
Autograph letter signed by sender. Thanks for all the packages. Would like to send copies of the supplement to John Brinkley and Fearon Fallows. Regarding D. F. J. Arago's statement. Method of making a barometer clock. Wishes the president of the Royal Society [of London] was changed every four or five years. Message for W. H. Wollaston from J. B. Biot.
24 October 1820 Sender: John Frederick William Herschel Reference number: HS/2/144
Autograph letter signed by sender. Informing Charles Babbage of the death of Mrs. Beckwith [wife of Thomas?]. W. E. Parry has returned successfully.
2 November 1820 Sender: John Frederick William Herschel Reference number: HS/2/145
Autograph letter signed by sender. Gives Latin motto. Is sending his chemical book.
2 November 1820 Sender: John Frederick William Herschel Reference number: HS/2/146
Autograph letter signed by sender. Offering any assistance during the funeral period of Mrs. Beckwith [wife of Thomas?].
3 November 1820 Sender: Charles Babbage Reference number: HS/2/147
Autograph letter signed by sender. Thanking him for offer of assistance. Will call on him and give him papers for the Astronomical Society.
7 November 1820 Sender: John Frederick William Herschel Reference number: HS/2/148
Autograph letter signed by sender. Giving him instructions arising from the recent meeting of the Astronomical Society. Gives details of John Frederick William Herschel's books he has in his possession. Has been experimenting with the game of noughts and crosses. Gives a problem in analysis. Regarding a paper by John Frederick William Herschel on numbers.
18 December 1820 Sender: Charles Babbage Reference number: HS/2/149
Autograph letter signed by sender. Remarks on the Royal Society [of London] Has written to J. B. Biot. Regarding the annual report. Needs a new council for the Astronomical Society. Please send him some copies of the rules. Meeting of Society of Arts. His recent chemical experiments. James South was with him last week and carried out observations.
19 December 1820 Sender: John Frederick William Herschel Reference number: HS/2/150
Autograph letter signed by sender. Suggestions for the wording of the annual report of the Astronomical Society. Wishes to propose a medal to be awarded for the theory of Saturn's satellites. Regarding the Lucasian professorship at Cambridge.
25 December 1820 Sender: John Frederick William Herschel Reference number: HS/2/151
Autograph letter signed by sender. Has been experimenting with magnetism. Two persons wish to become Foreign Members of the [Astronomical Society?]. Regarding the Lucasian at Cambridge. Would like John Frederick William Herschel to procure the medal of [Matthew Boulton?] for him.
April 1820 ? Sender: Charles Babbage Reference number: HS/2/341
Copy of letter, copied as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. Would he please send back some of his papers on astronomy as he wants them in order to draw up a prospectus.
17 January 1820 Sender: John Frederick William Herschel Reference number: HS/20/81
Copy of letter, copied as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. Regarding the forthcoming meeting of the Astronomical Society. The printing of his own address. Is preparing a paper on functional equations. Is prepared to accept the office of Foreign Secretary of the Astronomical Society.
2 February 1820 Sender: John Frederick William Herschel Reference number: HS/20/83
Copy of letter, copied as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. Was unable to attend the meeting of the Astronomical Society Council. Has heard the news regarding the president. Gives a problem of chance. Regarding the printing of the supplement.
19 March 1820 Sender: John Frederick William Herschel Reference number: HS/20/85
Copy of letter, copied as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. Will be going to Cambridge to try for the vacant professorship. Remarks on his reasons for applying for the post. His recent experiments with quartz.
4 April 1820 Sender: John Frederick William Herschel Reference number: HS/20/87
Copy of a letter. About plans for journey to visit Charles Babbage in Cornwall, and to go beyond.
12 April 1820 Sender: John Frederick William Herschel Reference number: HS/20/88
Copy of a letter. Declining invitation for William Herschel to be President of the Astronomical Society.
21 April 1820 Sender: John Frederick William Herschel Reference number: HS/20/91
Copy of letter, copied as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. Charles Babbage is 'incurable castle-builder.' Denies that John Frederick William Herschel falls easily into love. Eradicating 'one hastily conceived & silly passion' has deadened John Frederick William Herschel's heart. Any future love must follow a long acquaintance and friendship.
10 May 1820 Sender: John Frederick William Herschel Reference number: HS/20/96
Copy of letter, copied as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. Hopes to take up abode in his former lodgings. To what star does Charles Babbage refer to in his last letter [see Charles Babbage's 1820-5-22]?
23 May 1820 Sender: John Frederick William Herschel Reference number: HS/20/97
Copy of letter, copied as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. It looks as though their projected Cornish excursion will have to be postponed for a time. Gives the formula for the conversion of rags into sugar. A Finnish astronomer wishes to be elected a member of the Astronomical Society. Observations on the theory of parallax.
12 August 1820 Sender: John Frederick William Herschel Reference number: HS/20/99
Copy of letter, copied as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. Thanks for all the packages. Would like to send copies of the supplement to John Brinkley and Fearon Fallows. Regarding D. F. J. Arago's statement. Method of making a barometer clock. Wishes the president of the Royal Society [of London] was changed every four or five years. Message for W. H. Wollaston from J. B. Biot.
24 October 1820 Sender: John Frederick William Herschel Reference number: HS/20/102
Copy of letter, copied as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. Informing Charles Babbage of the death of Mrs. Beckwith [wife of Thomas?]. W. E. Parry has returned successfully.
2 November 1820 Sender: John Frederick William Herschel Reference number: HS/20/103
Copy of letter, copied as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. Gives Latin motto. Is sending his chemical book.
2 November 1820 Sender: John Frederick William Herschel Reference number: HS/20/104
Copy of letter, copied as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. Thanking him for offer of assistance. Will call on him and give him papers for the Astronomical Society.
7 November 1820 Sender: John Frederick William Herschel Reference number: HS/20/105
Copy of letter, copied as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. Remarks on the Royal Society [of London] Has written to J. B. Biot. Regarding the annual report. Needs a new council for the Astronomical Society. Please send him some copies of the rules. Meeting of Society of Arts. His recent chemical experiments. James South was with him last week and carried out observations.
19 December 1820 Sender: John Frederick William Herschel Reference number: HS/20/106
Copy of letter, copied as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. Suggestions for the wording of the annual report of the Astronomical Society. Wishes to propose a medal to be awarded for the theory of Saturn's satellites. Regarding the Lucasian professorship at Cambridge.
25 December 1820 Sender: John Frederick William Herschel Reference number: HS/20/107John Frederick William Herschel and Charles Babbage travel through France to Italy and Switzerland.
1821
John Frederick William Herschel publishes in the Philosophical Transactions of the Royal Society.
1821:
John Frederick William Herschel publishes “On the aberrations of compound lenses and object-glasses" in the Philosophical Transactions of the Royal Society.
John Frederick William Herschel receives the Copley Medal of the Royal Society for his papers printed in the Philosophical Transactions
1821

Autograph letter signed by sender. Hopes John Frederick William Herschel will meet Charles Babbage and Francis Baily in the near future to discuss arrangements for the Astronomical Society.
5 February 1821 Sender: Charles Babbage Reference number: HS/2/152
Autograph letter signed by sender. Hopes to call on Thursday to discuss queries. Regarding recent astronomical experiments. Alterations to his twenty-foot telescope.
22 January 1821 Sender: John Frederick William Herschel Reference number: HS/2/153
Autograph letter signed by sender. Meeting at Dr. George Pearson's on Friday next.
31 January 1821 Sender: Charles Babbage Reference number: HS/2/154
Autograph letter signed by sender. Regarding W. T. Brande's attack on the Astronomical Society. Joseph Banks and his opposition to Charles Babbage. Recent happenings in the Astronomical Society. Thanks for the volumes.
19 February 1821 Sender: Charles Babbage Reference number: HS/2/155
Autograph letter signed by sender. Regarding W. T. Brande's recent attack on the Astronomical Society. The Board of Longitude and its dealings with Charles Babbage. Has met Henry Warburton recently.
26 February 1821 Sender: John Frederick William Herschel Reference number: HS/2/156
Autograph letter signed by sender. Would Charles Babbage breakfast with John Frederick William Herschel in order to meet members of the Correction Committee.
April 1821 Sender: John Frederick William Herschel Reference number: HS/2/157
Autograph letter signed by sender. Please forward the address of H. Meikle, the computer.
4 May 1821 Sender: John Frederick William Herschel Reference number: HS/2/158
Autograph letter signed by sender. Will call on John Frederick William Herschel tomorrow. Has had a letter from Benjamin Gompertz.
8 May 1821 Sender: Charles Babbage Reference number: HS/2/159
Autograph letter signed by sender. Regarding John Frederick William Herschel's misunderstanding with George Dollond in the latter's quarrel with James South.
20 May 1821 Sender: Charles Babbage Reference number: HS/2/160
Autograph letter signed by sender. Unable to leave his wife. Has read about John Frederick William Herschel's purchases at Christie's.
21 May 1821 Sender: Charles Babbage Reference number: HS/2/161
Autograph letter signed by sender. No need for meeting of Correction Committee. Will be in town on Friday and hopes to meet him.
20 June 1821 Sender: John Frederick William Herschel Reference number: HS/2/162
Autograph letter signed by sender. Will be having a meeting with the Gwatkins. Regarding becoming a trustee of John Frederick William Herschel's and matters appertaining to it.
5 July 1821 Sender: Charles Babbage Reference number: HS/2/163
Autograph letter signed by sender. Has had a visit from Mr. Cox. Regarding payment of carriage for parcel from Vienna. Will be visiting him on Tuesday.
27 October 1821 Sender: Charles Babbage Reference number: HS/2/164
Autograph letter signed by sender. Is glad he is coming on Tuesday. Regarding the parcel of books from Vienna. Recent experiments with mercury.
29 October 1821 Sender: John Frederick William Herschel Reference number: HS/2/165
Autograph letter signed by sender. Would like to visit this week. Has had an attack of rheumatic fever. Gives tables of orbit of a comet.
5 November 1821 Sender: John Frederick William Herschel Reference number: HS/2/166
Autograph letter signed by sender. Regarding barometric observations.
25 November 1821 Sender: John Frederick William Herschel Reference number: HS/2/167
Autograph letter signed by sender. Regarding their chances of obtaining a professorship at Cambridge.
2 December 1821 Sender: John Frederick William Herschel Reference number: HS/2/168
Contemporary copy in Herschel's hand. Regarding their chances of obtaining a professorship at Cambridge.
2 December 1821 Sender: John Frederick William Herschel Reference number: HS/2/168a
Autograph letter signed by sender. Would like to see him and discuss plans regarding his calculating machine.
20 December 1821 Sender: Charles Babbage Reference number: HS/2/169
Autograph letter signed by sender. Can John Frederick William Herschel deputize for him at the Astronomical Society meeting?
1821 ? Sender: Charles Babbage Reference number: HS/2/345
Copy of letter, copied as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. Hopes to call on Thursday to discuss queries. Regarding recent astronomical experiments. Alterations to his twenty-foot telescope.
22 January 1821 Sender: John Frederick William Herschel Reference number: HS/20/110
Copy of letter, copied as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. Regarding W. T. Brande's recent attack on the Astronomical Society. The Board of Longitude and its dealings with Charles Babbage. Has met Henry Warburton recently.
26 February 1821 Sender: John Frederick William Herschel Reference number: HS/20/112
Copy of letter, copied as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. Would Charles Babbage breakfast with John Frederick William Herschel in order to meet members of the Correction Committee.
1821-4 Sender: John Frederick William Herschel Reference number: HS/20/115
Copy of letter, copied as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. Please forward the address of H. Meikle, the computer.
4 May 1821 Sender: John Frederick William Herschel Reference number: HS/20/116
Copy of letter, copied as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. No need for meeting of Correction Committee. Will be in town on Friday and hopes to meet him.
20 June 1821 Sender: John Frederick William Herschel Reference number: HS/20/119
Copy of letter, copied as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. [Theophila] Gwatkin will accept Georgiana Babbage's invitation. Will set date after Gwatkin returns from Baylin. Asks Charles Babbage to be trustee in John Herschel's marriage settlement to Harriet Gwatkin.
2 July 1821 Sender: John Frederick William Herschel Reference number: HS/20/120
Copy of letter, copied as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. Is glad he is coming on Tuesday. Regarding the parcel of books from Vienna. Recent experiments with mercury.
29 October 1821 Sender: John Frederick William Herschel Reference number: HS/20/125
Copy of letter, copied as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. Would like to visit this week. Has had an attack of rheumatic fever. Gives tables of orbit of a comet.
5 November 1821 Sender: John Frederick William Herschel Reference number: HS/20/127
Copy of letter, copied as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. Regarding barometric observations.
25 November 1821 Sender: John Frederick William Herschel Reference number: HS/20/129
Copy of letter, copied as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. Regarding their chances of obtaining a professorship at Cambridge.
2 December 1821 Sender: John Frederick William Herschel Reference number: HS/20/130Death of Sir William Herschel FRS
25 August 1822

Autograph letter signed by sender. Regarding W. T. Brande's attack on Sir Joseph Banks, and its relation to the Council of the Astronomical Society.
16 February 1822 Sender: John Frederick William Herschel Reference number: HS/2/170
Autograph letter signed by sender. Matters relating to his calculating machine.
9 April 1822 Sender: Charles Babbage Reference number: HS/2/171
Autograph letter signed by sender. Please forward enclosed note to Mrs. Roget [wife of P. M. Roget?]. Various items of interest.
26 April 1822 Sender: John Frederick William Herschel Reference number: HS/2/172
Autograph letter signed by sender. Will not be able to pay a visit as children have whooping cough. Has been demonstrating his calculating machine. Hopes to see him at the Greenwich visitation.
10 June 1822 Sender: Charles Babbage Reference number: HS/2/173
Autograph letter signed by sender. Has had a letter from the Secretary of the Dijon Academy offering him and Charles Babbage the title of Non-Resident Associate of the Academy. Is there any chance of seeing him in the near future?
13 July 1822 Sender: John Frederick William Herschel Reference number: HS/2/174
Autograph letter signed by sender. Query regarding the construction of a model of a machine for Charles Babbage. Charles Babbage's letter to Humphry Davy about his engines. He will be visiting the Netherlands shortly. P. S. Laplace has sent him details of his recent researches into gases. Hopes the family are well after their recent visit to Devon.
31 July 1822 Sender: John Frederick William Herschel Reference number: HS/2/175
Contemporary copy in Herschel's hand. Query regarding the construction of a model of a machine for Charles Babbage. Charles Babbage's letter to Humphry Davy about his engines. He will be visiting the Netherlands shortly. P. S. Laplace has sent him details of his recent researches into gases. Hopes the family are well after their recent visit to Devon. Annotated 'the original has been copied 1892" in Colonel John Herschel's hand top left corner of first folio.
31 July 1822 Sender: John Frederick William Herschel Reference number: HS/2/175a
Autograph letter signed by sender. Regarding the construction of the model machine. Things appertaining to the Netherlands. Regarding his new chemical theory.
3 August 1822 Sender: Charles Babbage Reference number: HS/2/176
Autograph letter signed by sender. The account will be inserted in the Morning Chronicle tomorrow.
10 September 1822 Sender: Charles Babbage Reference number: HS/2/177
Autograph letter signed by sender. Will be moving to Worchester shortly. Theory on stained glass. Regarding his recent pamphlet.
25 September 1822 Sender: Charles Babbage Reference number: HS/2/178
Autograph letter signed by sender. Caroline and Dietrich Herschel leave for Rotterdam in two days. Charles Babbage's 'offer of the heretifical Robes' and 'sacrilegious stain.' Thank [Woolrych Whitmore] for agricultural pamphlet sent to John Frederick William Herschel and [Richard] Jones. Sent Charles Babbage's letter to Humphry Davy and others.
16 October 1822 Sender: John Frederick William Herschel Reference number: HS/2/179
Autograph letter signed by sender. Destroy or return the article given him on Thursday. Has found something better.
19 October 1822 Sender: John Frederick William Herschel Reference number: HS/2/180
Autograph letter signed by sender. Regarding the copying of the painting by William Artaud. Send it by coach if possible. Meeting of the Astronomical Society Council and matters arising from it.
28 October 1822 Sender: Charles Babbage Reference number: HS/2/181
Autograph letter signed by sender. Regarding the Cambridge affair. Has had a letter from the Edinburgh Society of Arts.
5 December 1822 Sender: John Frederick William Herschel Reference number: HS/2/182
Autograph letter signed by sender. Has had a letter from George Peacock. Regarding the Lucasian Professorship at Cambridge.
1822 ? Sender: Charles Babbage Reference number: HS/2/346
Copy of letter, copied as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. Caroline and Dietrich Herschel leave for Rotterdam in two days. Charles Babbage's 'offer of the heretifical Robes' and 'sacrilegious stain.' Thank [Woolrych Whitmore] for agricultural pamphlet sent to John Frederick William Herschel and [Richard] Jones. Sent Charles Babbage's letter to Humphry Davy and others.
16 October 1822 Sender: John Frederick William Herschel Reference number: HS/19/46
Copy of letter, copied as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. Regarding W. T. Brande's attack on Sir Joseph Banks, and its relation to the Council of the Astronomical Society.
16 February 1822 Sender: John Frederick William Herschel Reference number: HS/20/134
Copy of a letter. Tells Charles Babbage that John Frederick William Herschel has seen a calculating machine made by some 'rascally frenchman'.
1822-4 Sender: John Frederick William Herschel Reference number: HS/20/135
Copy of letter, copied as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. Please forward enclosed note to Mrs. Roget [wife of P. M. Roget?]. Various items of interest.
26 April 1822 Sender: John Frederick William Herschel Reference number: HS/20/139
Copy of letter, copied as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. Has had a letter from the Secretary of the Dijon Academy offering him and Charles Babbage the title of Non-Resident Associate of the Academy. Is there any chance of seeing him in the near future?
13 July 1822 Sender: John Frederick William Herschel Reference number: HS/20/147
Copy of letter, copied as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. Query regarding the construction of a model of a machine for Charles Babbage. Charles Babbage's letter to Humphry Davy about his engines. He will be visiting the Netherlands shortly. P. S. Laplace has sent him details of his recent researches into gases. Hopes the family are well after their recent visit to Devon.
31 July 1822 Sender: John Frederick William Herschel Reference number: HS/20/149
Copy of letter, copied as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. Caroline and Dietrich Herschel leave for Rotterdam in two days. Charles Babbage's 'offer of the heretifical Robes' and 'sacrilegious stain.' Thank [Woolrych Whitmore] for agricultural pamphlet sent to John Frederick William Herschel and [Richard] Jones. Sent Charles Babbage's letter to Humphry Davy and others.
16 October 1822 Sender: John Frederick William Herschel Reference number: HS/20/152
Copy of letter, copied as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. Destroy or return the article given him on Thursday. Has found something better.
19 October 1822 Sender: John Frederick William Herschel Reference number: HS/20/153
Copy of letter, copied as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. Regarding the Cambridge affair. Has had a letter from the Edinburgh Society of Arts.
5 December 1822 Sender: John Frederick William Herschel Reference number: HS/20/158John Frederick William Herschel receives the Bakerian Medal of the Royal Society.
1823:
John Frederick William Herschel gives the Bakerian lecture “On certain Motions produced in Fluid Conductors when transmitting the Electric Current”.

Autograph letter signed by sender. Events at Cambridge. Has a paper by A. L. Cauchy for him. Has met Humphry Davy and discussed Charles Babbage's machine. Charles Babbage is celebrated in verse.
4 March 1823 Sender: John Frederick William Herschel Reference number: HS/2/183
Autograph letter signed by sender. Has had a meeting with the Chancellor of the Exchequer concerning his calculating machine. Is to get financial assistance from the government. Hopes to see John Frederick William Herschel on Monday night.
27 June 1823 Sender: Charles Babbage Reference number: HS/2/184
Autograph letter signed by sender. Is sending the agreement between the government and Charles Babbage regarding payment for work on the calculating machine.
2 July 1823 Sender: Charles Babbage Reference number: HS/2/185
Autograph letter signed by sender. Has signed the paper regarding the machine and is returning it. Regarding its publicity with Members of Parliament.
5 July 1823 Sender: John Frederick William Herschel Reference number: HS/2/186
Autograph letter signed by sender. Regarding the paper on the machine for the Treasury. Will postpone his visit to Slough.
9 July 1823 Sender: Charles Babbage Reference number: HS/2/187
Autograph letter signed by sender. There is to be a sale of pictures, including one of John Frederick William Herschel; would he like it? Has not heard anything from the Treasury yet regarding payment of his money. Plans for projected holiday.
18 July 1823 Sender: Charles Babbage Reference number: HS/2/188
Autograph letter signed by sender. Regarding the Chancellor of the Exchequer and the calculating machine. Recent astronomical observations.
29 July 1823 Sender: John Frederick William Herschel Reference number: HS/2/189
Autograph letter signed by sender. Has purchased the picture for £8. Will be at Birmingham tomorrow.
10 August 1823 Sender: Charles Babbage Reference number: HS/2/190
Autograph letter signed by sender. Enclosing an invitation from Humphry Davy to dine with him. Invitation for John Frederick William Herschel to dine with Charles Babbage also.
23 November 1823 Sender: Charles Babbage Reference number: HS/2/191John Frederick William Herschel moves to 56 Devonshire St., Portland Place, London
1824
John Frederick William Herschel serves as Secretary of the Royal Society
30 November 1824

Autograph letter signed by sender. Regarding the First Assistant at Greenwich Observatory, and the possibility of John Frederick William Herschel ever becoming Astronomer Royal. Hopes to see him on Wednesday.
18 January 1824 Sender: John Frederick William Herschel Reference number: HS/2/192
Autograph letter signed by sender. Is leaving from Cambridge. Hopes that he will come. Has some new things on functional analysis to discuss.
8 March 1824 Sender: Charles Babbage Reference number: HS/2/193
Autograph letter signed by sender. Relates experiences and persons met recently in Paris. Account of Alpine scenery and travel experiences. [Continued 1824-4-20 Turin:] Events while travelling to Turin. [Continued 1824-4-22 Alessandria:] Has met Plana at Turin Observatory. Five days of discussions with him. Please order two specified books and send to Plana. View of the Alps.
11 April 1824 Sender: John Frederick William Herschel Reference number: HS/2/194
Autograph letter signed by sender. Recent experiences in crossing the Alps. Overturning of the coach and his narrow escape.
5 May 1824 Sender: John Frederick William Herschel Reference number: HS/2/194a
Autograph letter signed by sender. Recent meeting and astronomical observations with G. B. Amici. [Repeat of his narrow escape in the Alps, related in John Frederick William Herschel's 1824-5-5]
9 May 1824 Sender: John Frederick William Herschel Reference number: HS/2/195
Autograph letter signed by sender. Has been appointed director of a company. Offers shares to John Frederick William Herschel. Has sent books to G. A. A. Plana. Wife and children in Devon.
28 May 1824 Sender: Charles Babbage Reference number: HS/2/196
Autograph letter signed by sender. Is observing the heavens from Etna. [Letter continued 11 July from Palermo:] Recent experiences touring Sicily.
4 July 1824 Sender: John Frederick William Herschel Reference number: HS/2/197
Contemporary copy in Herschel's hand.Time (1.30am) and atmospheric conditions of the letter noted. Is observing the heavens from Etna. [Letter continued 11 July from Palermo:] Recent experiences touring Sicily.
4 July 1824 Sender: John Frederick William Herschel Reference number: HS/2/197a
Autograph letter signed by sender. The Insurance firm for which he acted as director has been wound up. Has taken a holiday in the country.
14 September 1824 Sender: Charles Babbage Reference number: HS/2/198
Autograph letter signed by sender. His recent tours in Italy and Germany, and the people he met.
3 October 1824 Sender: John Frederick William Herschel Reference number: HS/2/199
Autograph letter signed by sender. Is glad to hear of his speedy return. Regarding John Frederick William Herschel's instruments and their passage through the customs. Is writing a book on Assurance Companies.
10 October 1824 Sender: Charles Babbage Reference number: HS/2/200
Copy of letter, copied as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. Recent meeting and astronomical observations with G. B. Amici. [Repeat of his narrow escape in the Alps, related in John Frederick William Herschel's 1824-5-5]
9 May 1824 Sender: John Frederick William Herschel Reference number: HS/20/180
Copy of letter, copied as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. Is observing the heavens from Etna. [Letter continued 11 July from Palermo:] Recent experiences touring Sicily.
4 July 1824 Sender: John Frederick William Herschel Reference number: HS/20/181John Frederick William Herschel invents the actinometer to measure the heating power of the Sun’s rays
1825
Charles Babbage and John Frederick William Herschel publish in the Philosophical Transactions
1825:
Charles Babbage and John Frederick William Herschel publish an “Account of the repetition of M. Arago's experiments on the magnetism manifested by various substances during the act of rotation”.

Autograph letter signed by sender. Regarding [William?] French and G. B. Airy. Will breakfast with John Frederick William Herschel on Sunday. Going to Cambridge on Monday and would like his company.
30 November 1825 Sender: Charles Babbage Reference number: HS/2/201
Autograph letter signed by sender. Is sorry he will be unable to see him. Is sending copies of their paper for distribution.
1825 ? Sender: John Frederick William Herschel Reference number: HS/2/366
Autograph letter signed by sender. Hopes to see him in town and then they can go to see Joseph Clement. His observations are being spoilt by bad weather.
Sender: John Frederick William Herschel Reference number: HS/2/368John Frederick William Herschel publishes in the Philosophical Transactions
1826:
John Frederick William Herschel publishes “On the parallax of the fixed stars”.

Autograph letter signed by sender. Encloses a letter from Dr. John Brinkley. Please send on his manuscript catalogue of nebulae. Regarding the reading and printing of Charles Babbage's paper at the Analytical. Site for his pendulum experiments.
24 May ? 1826 Sender: John Frederick William Herschel Reference number: HS/2/202
Autograph letter signed by sender. Has been to the observatory. New comet discovered. Has met P. S. Laplace. Does he know of any tables of logarithms to 10,000?
17 August 1826 Sender: Charles Babbage Reference number: HS/2/203
Autograph letter signed by sender. Geological remarks on the surrounding area and excursions made.
25 September 1826 Sender: John Frederick William Herschel Reference number: HS/2/204
Autograph letter signed by sender. Has just returned from collecting information on machines. Regarding the Lucasian professorship at Cambridge. Has met a clockmaker who is able to work on his machine.
24 November 1826 Sender: Charles Babbage Reference number: HS/2/205
Autograph letter signed by sender. Would like to spend Christmas with him. Does he want a Newfoundland puppy?
14 December 1826 Sender: Charles Babbage Reference number: HS/2/206
Autograph letter signed by sender. Regarding Mr. Moreau and his certificate. Recent happenings at the Royal Society [of London] Has been pheasant shooting.
16 December 1826 Sender: Charles Babbage Reference number: HS/2/207
Autographed letter, incomplete. Regarding certificates at the Royal Society [of London] Relates recent occurrences over form of certificates. Would like to see him at Christmas.
December 1826 Sender: John Frederick William Herschel Reference number: HS/2/397
Autographed letter . Directory of specified shops. List of chemical apparatus.
Sender: John Frederick William Herschel Reference number: HS/2/398
Autograph letter signed by sender. Tells Charles Babbage that everyone is anxious to have Charles Babbage allow his name to stand for the Secretaryship of the Royal Society [of London] John Frederick William Herschel lists many names of people who have all said they would vote for Charles Babbage.
17 November 1826 Sender: John Frederick William Herschel Reference number: HS/27/2
Draft letter. In describing the way in which J. G. Children was elected to the secretaryship, John Frederick William Herschel says 'the matter was irregularly brought by the President before a meeting of eight or nine persons whom he chose to call a council' to meet for a few minutes 'to transmit some business connected with the Treasurer's accounts.' John Frederick William Herschel feels Humphry Davy's actions will not be excused even by Davy's best friends.
25 November 1826 Sender: John Frederick William Herschel Reference number: HS/27/9Joseph Nicéphore Niépce presents his photographs in England for the first time
1827

Autograph letter signed by sender. Argues that neither Charles Babbage nor his friends should in any way act to create difficulty at future Royal Society [of London] meetings, as that will allow those attacked to resign with dignity. Rather elect someone else at the next anniversary meeting.
30 January 1827 Sender: John Frederick William Herschel Reference number: HS/2/208
Autograph letter signed by sender. Announcing his decision of resigning from the Secretaryship of the Royal Society [of London]
27 June 1827 Sender: John Frederick William Herschel Reference number: HS/2/211
Autograph letter signed by sender. Letter of condolence on the death of Charles Babbage's son Charles.
29 July 1827 Sender: John Frederick William Herschel Reference number: HS/2/212
Autograph letter signed by sender. Has visited Louvain and also a steam engine factory near Liege. Account of various excursions.
17 November 1827 Sender: Charles Babbage Reference number: HS/2/217
Autograph letter signed by sender. News of his family. Joseph Clement's work on the machine and alterations proposed. Clement wants payment of £150. Recent happenings at the Royal Society [of London]
22 December 1827 Sender: John Frederick William Herschel Reference number: HS/2/218
Autograph letter signed by sender. News of the illness of his son.
July 1827 Sender: Charles Babbage Reference number: HS/2/342
Autograph letter signed by sender. The hour of meeting of council is to be altered. Bring his paper on notation.
Sender: Charles Babbage Reference number: HS/2/343
Autograph letter signed by sender. Is forwarding parcels. Getting ready for some experiments.
Sender: Charles Babbage Reference number: HS/2/344
Autograph letter signed by sender. Understands his intellectual pursuits. Gives address of his son [Adelaide].
1827 ? Sender: Charles Babbage Reference number: HS/2/347
Autograph letter signed by sender. Remarks on various equations.
Sender: Charles Babbage Reference number: HS/2/348
Autograph letter signed by sender. Regarding various publications for distribution.
1827 to 1829 Sender: John Frederick William Herschel Reference number: HS/2/369
Autographed letter . News concerning Edward Ryan.
Sender: John Frederick William Herschel Reference number: HS/2/370
Draft copy in Herschel's hand. Argues that neither Charles Babbage nor his friends should in any way act to create difficulty at future Royal Society [of London] meetings, as that will allow those attacked to resign with dignity. Rather elect someone else at the next anniversary meeting. Significant amendments and modifications.
30 January 1827 Sender: John Frederick William Herschel Reference number: HS/27/11
Autograph letter signed by sender. Family is well. News of Joseph Clement's work on the machine. Details of the new drawings made. Recent events at the Royal Society [of London] Is giving up lodgings in town and returning to Slough. Sorry to hear of G. B. Amici's health. Regarding Amici's gifts to the Royal Society [of London]
12 February 1828 Sender: John Frederick William Herschel Reference number: HS/2/219
Autograph letter signed by sender. Informing him that he has been elected to the Lucasian professorship at Cambridge. Offers congratulations and gives views of other friends of his success. He should return to take up his appointment.
9 March 1828 Sender: John Frederick William Herschel Reference number: HS/2/222
Autograph letter signed by sender. His feelings on hearing of his being elected to the Lucasian professorship at Cambridge. Regarding Joseph Clement and the work on his machine.
2 April 1828 Sender: Charles Babbage Reference number: HS/2/224
Autograph letter signed by sender. Regarding Joseph Clement and the work on his machine. Account of his recent excursions.
9 May 1828 Sender: Charles Babbage Reference number: HS/2/226
Autograph letter signed by sender. Not much news. Regarding Joseph Clement and his work on the machine. William Whewell and G. B. Airy's pendulum experiments. Has had a letter from J. R. Ryan.
30 September 1828 Sender: John Frederick William Herschel Reference number: HS/2/234John Frederick William Herschel and Margaret Brodie Stewart are married in London
3 March 1829

Autograph letter signed by sender. Will endeavor to obtain information about the fellowships at St. John's.
23 January 1829 Sender: Charles Babbage Reference number: HS/2/237
Autograph letter signed by sender. Can Charles Babbage come down on Sunday to see about the machine?
26 January 1829 Sender: John Frederick William Herschel Reference number: HS/2/238
Autograph letter signed by sender. Difficulties over his machine. Joseph Clement threatens strike action. Would like to become acquainted with John Frederick William Herschel's friend. Advice on marriage given.
6 March 1829 Sender: Charles Babbage Reference number: HS/2/239
Autograph letter signed by sender. Hears he is at Dudmaston. Has a brother-in-law who will shortly be travelling to India and would like suggestions of books and instruments for him to take. Also letter of introduction to Edward Ryan.
4 November 1829 Sender: John Frederick William Herschel Reference number: HS/2/240
Autograph letter signed by sender. Regarding the monetary affairs of his sister-in-law. Has had discussions regarding his machine. Has just commenced writing a pamphlet on the state of science in England. Everyone has been asking for John Frederick William Herschel.
11 December 1829 Sender: Charles Babbage Reference number: HS/2/241
Autograph letter signed by sender. Will be in town on Thursday to execute the deed of attorney. Is glad to hear that Arthur Wellesley (1st Duke of Wellington) has taken an interest in the machine. Remarks on his pamphlet State of Science in England. Alterations at Slough.
15 December 1829 Sender: John Frederick William Herschel Reference number: HS/2/242
Draft letter. Tells Charles Babbage about a visit by John Frederick William Herschel and Wolryche Whitmore to the Duke [of ?] to present the case for more government funds for Charles Babbage's calculating machine.
May 1829? Sender: John Frederick William Herschel Reference number: HS/27/52John Frederick William Herschel is elected Foreign correspondent of the Académie des sciences
1830
Birth of Caroline Emilia Mary Herschel, daughter of John Frederick William Herschel and Margaret Brodie Stewart
31 March 1830
John Frederick William Herschel is nominated for the presidency of the Royal Society, loses by 8 votes to the Duke of Sussex
30 November 1830

Autograph letter signed by sender. Has heard the news about Government support for the machine; is this correct?
28 February 1830 Sender: John Frederick William Herschel Reference number: HS/2/243
Autograph letter signed by sender. Latest news of his machine. His book is going to press in 10 days. Would like proofsheet of last sheet of John Frederick William Herschel's 'Sound.'
8 March 1830 Sender: Charles Babbage Reference number: HS/2/244
Autograph letter signed by sender. Regarding Charles Babbage's attitude to the machine. Is sending rough proof of the page on 'Sound.'
8 March 1830 Sender: John Frederick William Herschel Reference number: HS/2/245
Autograph letter signed by sender. Regarding his forthcoming pamphlet and his attitudes to scientific societies. Sent him the wrong page of 'Sound.' Has just returned from Leicestershire. David Brewster sent a problem.
19 March 1830 Sender: Charles Babbage Reference number: HS/2/246
Autograph letter signed by sender. Regarding his projected biography of Dr. Thomas Young. His own book on the decline of science is in the press. Regarding the life and manners of Dr. Young.
23 March 1830 Sender: Charles Babbage Reference number: HS/2/247
Autograph copy letter signed by sender. Regarding Babbage's projected biography of Dr. Thomas Young. His own book on the decline of science is in the press. Regarding the life and manners of Dr. Young.
23 March 1830 Sender: Charles Babbage Reference number: HS/2/248
Autograph letter signed by sender. Is sorry to note the tone of Charles Babbage's last letter concerning his projected biography of Dr. Thomas Young, but he means to carry out his project. Edward Sabine received £1000 from the Board of Longitude.
24 March 1830 Sender: John Frederick William Herschel Reference number: HS/2/249
Draft letter with extensive corrections. Is sorry to note the tone of Charles Babbage's last letter concerning his projected biography of Dr. Thomas Young, but he means to carry out his project. Edward Sabine received £1000 from the Board of Longitude.
24 March 1830 Sender: John Frederick William Herschel Reference number: HS/2/250
Autograph letter signed by sender. Further remarks on Dr. Thomas Young and John Frederick William Herschel's projected biography. Has had a copy of a letter from J. F. Encke about an Astronomical Ephemeris for the Society for Promoting Useful Knowledge.
27 March 1830 Sender: Charles Babbage Reference number: HS/2/251
Autograph letter signed by sender. Has read his book on the decline of science and thinks that the book may do some good. Comments on various parts, and outlines things that could happen as the result. Has replied to Encke's letter about Ephemeris.
22 May 1830 Sender: John Frederick William Herschel Reference number: HS/2/252
Autograph letter signed by sender. Will he be at home later this week as he would like to call on him. Wishes to discuss the Nautical Almanac. Gives political news.
6 August 1830 Sender: Charles Babbage Reference number: HS/2/253
Autograph letter signed by sender. Will be very pleased to see him and hopes he will spend longer with him. Has just finished a new 20-foot mirror for his telescope. Regarding alterations in the Nautical Almanac.
10 August 1830 Sender: John Frederick William Herschel Reference number: HS/2/254
Autograph letter signed by sender. Has not seen the letter in the Herald about the possibility of himself standing for the presidency of the Royal Society [of London] Raises six queries regarding manufactures and other scientific facts.
15 October 1830 Sender: John Frederick William Herschel Reference number: HS/2/255
Autograph letter signed by sender. Agrees with his opinions held about the Royal Society [of London] Is going out of town immediately; so unable to answer the queries completely. Regarding the magnetic muzzle used by needle makers.
17 October 1830 Sender: Charles Babbage Reference number: HS/2/256
Autograph letter signed by sender. His views on hearing that he has been nominated for the position of President of the Royal Society [of London] Does not wish to become the president, but will do so if elected.
26 November 1830 Sender: John Frederick William Herschel Reference number: HS/2/257
Autograph letter signed by sender. Would he please send back the proofs he sent the other day as the printers have requested their return. Regarding affairs at the Royal Society [of London] Has he heard from the Treasury?
9 December 1830 Sender: John Frederick William Herschel Reference number: HS/2/258
Autograph letter signed by sender. Sending books for Wilhelm Struve. Would like to see the latter before he returns to Germany.
26 September 1830 Sender: John Frederick William Herschel Reference number: HS/2/371
Autograph letter signed by sender. Will call on him tomorrow.
Sender: John Frederick William Herschel Reference number: HS/2/372
Autograph letter signed by sender. Introducing a Mr. Wartam of the Armenian church at Vienna, who knows Charles Babbage's work on mathematics.
Sender: John Frederick William Herschel Reference number: HS/2/373
Autograph letter signed by sender. Will call for him on his way to the river.
Sender: John Frederick William Herschel Reference number: HS/2/374
Autograph letter signed by sender. Will he meet him tomorrow.
Sender: John Frederick William Herschel Reference number: HS/2/375
Autograph letter signed by sender. Regrets that he will be unable to come and see the experiments as he is laid up with rheumatism.
Sender: John Frederick William Herschel Reference number: HS/2/376
Autograph letter signed by sender. Please send enclosed to Mr. Tukinor [?]. Gives brother-in-law's statement concerning Mrs. Urquhart and Mr. Deguise.
1830 Sender: John Frederick William Herschel Reference number: HS/2/399
Copy letter, from "copy book vol I". Has read his book on the decline of science and thinks that the book may do some good. Comments on various parts, and outlines things that could happen as the result. Has replied to Encke's letter about Ephemeris.
22 May 1830 Sender: John Frederick William Herschel Reference number: HS/25/1/1
Copy letter, from "copy book vol I". Has not seen the letter in the Herald about the possibility of himself standing for the presidency of the Royal Society [of London] Raises six queries regarding manufactures and other scientific facts.
15 October 1830 Sender: John Frederick William Herschel Reference number: HS/25/1/8
Copy of letter, copied as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. His views on hearing that he has been nominated for the position of President of the Royal Society [of London] Does not wish to become the president, but will do so if elected.
26 November 1830 Sender: John Frederick William Herschel Reference number: HS/25/1/12Mary Somerville publishes Mechanism of the Heavens
1831
Sir John Herschel is created Knight of the Royal Hanoverian Guelphic Order
1831
Sir John Herschel publishes Preliminary Discourse on the Study of Natural Philosophy as part of Dionysius Lardner’s Cabinet Cyclopaedia.
1831
Birth of Isabella Herschel, daughter of John Frederick William Herschel and Margaret Brodie Stewart
5 June 1831

Autograph letter signed by sender. Has just found out that the government has approached the Royal Society [of London] as to the usefulness and chances of success of his machine. Hopes that if John Frederick William Herschel is appointed he will not become involved in the committees of the Royal Society [of London] Has been deciphering a cipher.
21 February 1831 Sender: Charles Babbage Reference number: HS/2/259
Autograph letter signed by sender. Has noted his remarks about attending the committees of the Royal Society [of London] Received one to discuss the engine, but was unable to attend as he had other arrangements. Views on present attitude of the Royal Society [of London] Council to the machine. Intends to revise and enlarge his books Light and Sound.
25 February 1831 Sender: John Frederick William Herschel Reference number: HS/2/260
Autograph letter signed by sender. Encloses a letter sent to his mother in Devonshire St.. Regarding John Frederick William Herschel's votes. His plan for removal prospers.
24 April 1831 Sender: Charles Babbage Reference number: HS/2/261
Autograph letter signed by sender. David Brewster is in town. Has arranged a series of meetings and excursions for him. Hopes John Frederick William Herschel will come to town. His mother and daughter are at Brighton.
20 June 1831 Sender: Charles Babbage Reference number: HS/2/262
Autograph letter signed by sender. Will come up to town and meet David Brewster. Effect of violet light on chemical compound. Gives some of his recent astronomical observations.
23 June 1831 Sender: John Frederick William Herschel Reference number: HS/2/263
Autograph letter signed by sender. Is sending a query from Florence, also a letter from Vincenzio Antinori, which please return. Additional facts supporting his views expressed in the Decline of Science. Frederick Augustus (Duke of Sussex) has been challenged over government of the Royal Society [of London] Engine progresses well. [Also contains draft of reply which is the same as John Frederick William Herschel's 1831-9-13.]
13 September 1831 Sender: Charles Babbage Reference number: HS/2/264
Autograph letter signed by sender. Is sending mirror in perfect state for Vincenzio Antinori at Florence, together with his letter. Regarding Gerard Moll's book. Has no time to spare to attend the [B.A.A.S.] meeting at York.
13 September 1831 Sender: John Frederick William Herschel Reference number: HS/2/265
Autograph letter signed by sender. Please could he obtain through Miss Caroline Herschel several copies of the Hannover Gazette which includes his own name when he was awarded the Guelphic Order. There is talk that Frederick Augustus (Duke of Sussex) is going to Ireland.
17 October 1831 Sender: Charles Babbage Reference number: HS/2/266
Autograph letter signed by sender. Will contact his aunt for the Hannover Gazette. Wishes to see Joseph Clement about moving the telescope.
22 October 1831 Sender: John Frederick William Herschel Reference number: HS/2/267
Autograph letter signed by sender. One of Joseph Clement's workmen will be coming down to work on John Frederick William Herschel's telescope. Gives rates of pay, etc. Has just got the Treasury to give their order for the completion of the buildings.
29 October 1831 Sender: Charles Babbage Reference number: HS/2/268
Autograph letter signed by sender. Had to return without seeing him owing to his mother's health. Regarding the present controversies. Is annoyed by the conduct of David Brewster.
9 December 1831 Sender: John Frederick William Herschel Reference number: HS/2/269
Contemporary copy letter in Herschel's hand. Annotated: "vide also copy of letter Jan. 9/32". Had to return without seeing him owing to his mother's health. Regarding the present controversies. Is annoyed by the conduct of David Brewster.
9 December 1831 Sender: John Frederick William Herschel Reference number: HS/2/269a
Autograph letter signed by sender. Regarding J. F. Daniel[l]'s lecture. His own views on the validity of the attacks. Regarding John Frederick William Herschel's opinion on David Brewster.
10 December 1831 Sender: Charles Babbage Reference number: HS/2/270
Autograph letter signed by sender. Regarding J. F. Daniel[l]'s attack on John Frederick William Herschel and Charles Babbage.
December 1831 Sender: Charles Babbage Reference number: HS/2/339
Copy of letter, copied as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. Had to return without seeing him owing to his mother's health. Regarding the present controversies. Is annoyed by the conduct of David Brewster.
9 December 1831 Sender: John Frederick William Herschel Reference number: HS/21/95
Autograph letter signed by sender. Recent loss [death of his mother] has put the controversies temporarily aside. Gives further news of various matters which affect him. Feels angry at David Brewster's manner.
9 January 1832 Sender: John Frederick William Herschel Reference number: HS/2/271
Extract from a letter in Herschel's hand. Recent loss [death of his mother] has put the controversies temporarily aside. Gives further news of various matters which affect him. Feels angry at David Brewster's manner.
9 January 1832 Sender: John Frederick William Herschel Reference number: HS/2/271a
Autograph letter signed by sender. Has just heard of the death of Lady Herschel. Will be at Slough for the funeral on Friday.
10 January 1832 Sender: Charles Babbage Reference number: HS/2/272
Autograph letter signed by sender. Regarding the situation on the Cape of Good Hope. Is sending a paper of Dr. [William?] Henry. David Brewster suffered last Thursday.
12 March 1832 Sender: Charles Babbage Reference number: HS/2/273
Autograph letter signed by sender. Regarding Charles Babbage's failure in political matters. Sees cause for congratulation. Would he tell him where he can see the manufacture of springs.
14 December 1832 Sender: John Frederick William Herschel Reference number: HS/2/274
Autograph letter signed by sender. Regarding the results of the Finsbury election. Has been invited to a public dinner and would like him to come, together with some of his scientific friends. Part of his machine is ready.
15 December 1832 Sender: Charles Babbage Reference number: HS/2/275
Autograph letter signed by sender. Will attend Charles Babbage's dinner on Wednesday. Can John Frederick William Herschel bring his brother-in-law? Will call at Charles Babbage's house before the dinner.
16 December 1832 Sender: John Frederick William Herschel Reference number: HS/2/276
Autograph letter signed by sender. Is delighted that John Frederick William Herschel is coming to dinner.
18 December 1832 Sender: Charles Babbage Reference number: HS/2/277
Copy of letter, copied as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. Recent loss [death of his mother] has put the controversies temporarily aside. Gives further news of various matters which affect him. Feels angry at David Brewster's manner.
9 January 1832 Sender: John Frederick William Herschel Reference number: HS/21/99Sir John Herschel receives the Royal Medal from the Royal Society
1833:
The Medal is awarded "For his paper on nebulae and clusters of stars, published in the Philosophical Transactions for 1833."
Sir John Herschel publishes A treatise on astronomy as part of Dionysius Lardner’s Cabinet Cyclopaedia.
1833
Birth of William James Herschel, son of John Frederick William Herschel and Margaret Brodie Stewart
1833
Sir John Herschel departs for South Africa with his wife and their three children
13 November 1833

Autograph letter signed by sender. Has glanced over the papers and made a few corrections. Suggests one point for alteration.
6 March 1833 Sender: Charles Babbage Reference number: HS/2/278
Autograph letter signed by sender. The first evening party is on Saturday, and hopes John Frederick William Herschel will be able to come.
16 April 1833 Sender: Charles Babbage Reference number: HS/2/279
Autograph letter signed by sender. Is trying to prepare his book for the press, and is suffering from a severe attack of influenza.
18 April 1833 Sender: John Frederick William Herschel Reference number: HS/2/280
Autograph letter signed by sender. Will not be in town until early June owing to pressure of work. Thanks for information on Van Dieman's Land, but they have decided on the Cape.
24 April 1833 Sender: John Frederick William Herschel Reference number: HS/2/281
Autograph letter signed by sender. Outlines possible program for Wednesday.
10 June 1833 Sender: Charles Babbage Reference number: HS/2/282
Autograph letter signed by sender. Regarding Society matters. Small parcel has arrived for John Frederick William Herschel.
15 June 1833 Sender: Charles Babbage Reference number: HS/2/283
Autograph letter signed by sender. Let him know when the next Levee is.
6 July 1833 Sender: John Frederick William Herschel Reference number: HS/2/284
Autograph letter signed by sender. Giving the date of the next Levee.
7 July 1833 Sender: Charles Babbage Reference number: HS/2/285Birth of Margaret Louisa Herschel, daughter of John Frederick William Herschel and Margaret Brodie Stewart
1834

Autograph letter signed by sender. Is settled near Cape Town. Experiences on the voyage. Details of his telescope arrangements, and observations carried out.
9 February 1834 Sender: John Frederick William Herschel Reference number: HS/2/286
Autograph letter signed by sender. Regarding his machine. Suggested modifications for it. Recent meeting of the B.A.A.S. Political events.
18 September 1834 Sender: Charles Babbage Reference number: HS/2/287
Autograph letter signed by sender. Regarding Charles Babbage's machine. Edward Ryan's visit. Events at the Cape. Failure of his astronomical observations due to cloud conditions. Has been trying to stir up the South African Philosophical Society. Recent South African expedition.
23 December 1834 Sender: John Frederick William Herschel Reference number: HS/2/288
Copy of letter, copied as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. Regarding Charles Babbage's machine. Edward Ryan's visit. Events at the Cape. Failure of his astronomical observations due to cloud conditions. Has been trying to stir up the South African Philosophical Society. Recent South African expedition.
23 December 1834 Sender: John Frederick William Herschel Reference number: HS/25/4/5Sir John Herschel serves as President of the Literary and Philosophical Society of the Cape of Good Hope
1835
Halley’s comet becomes visible
28 November 1835

Autograph letter signed by sender. Commiserating on Charles Babbage's calamity.
20 January 1835 Sender: John Frederick William Herschel Reference number: HS/2/289Birth of Alexander Stewart Herschel, son of John Frederick William Herschel and Margaret Brodie Stewart
5 February 1836
Victoria becomes Queen of the United Kingdom
20 June 1837
Birth of John Herschel, son of John Frederick William Herschel and Margaret Brodie Stewart
29 October 1837

Autograph letter, likely draft in pencil in Herschel's hand. Comments on some parts of Charles Babbage's Ninth Bridgewater Treatise, especially on Charles Babbage's mathematical estimating of the credibility of miracles. John Frederick William Herschel shows that such a process cannot work. [Letter finished 1837-10-25.]
25 October 1837 Sender: John Frederick William Herschel Reference number: HS/2/290
Copy of letter, copied as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. Comments on some parts of Charles Babbage's Ninth Bridgewater Treatise, especially on Charles Babbage's mathematical estimating of the credibility of miracles. John Frederick William Herschel shows that such a process cannot work. [Letter finished 1837-10-25.]
2 October 1837 Sender: John Frederick William Herschel Reference number: HS/25/5/9Sir John Herschel returns from South Africa
1838: A banquet in presence of Queen Victoria is given to celebrate his return to Britain and made a Baronet.

Draft letter in Herschel's hand, marked 'most confidential' and dated 'Tuesday night' Has had a long letter from Frederick Augustus (Duke of Sussex), who wishes him to accept a baronetcy. John Frederick William Herschel's comments on this after refusing the title. Considers necessary to accept so as not to 'wound feelings' despite the dangers accepting entails.
19 June 1838 Sender: John Frederick William Herschel Reference number: HS/2/290a
Autograph letter signed by sender. Regarding his party. Difficulties and accidents.
15 August 1838 Sender: John Frederick William Herschel Reference number: HS/2/291
Autograph letter signed by sender. Has had a long letter from Frederick Augustus (Duke of Sussex), who wishes him to accept a baronetcy. John Frederick William Herschel's comments on this after refusing the title. Considers necessary to accept so as not to 'wound feelings' despite the dangers accepting entails.
19 June 1838 Sender: John Frederick William Herschel Reference number: HS/2/400
Autograph letter signed by sender. Will not be able to come to town until Saturday. Has solved one of his chemical problems. Has not done anything to his mathematical works.
Sender: John Frederick William Herschel Reference number: HS/2/401
Autograph letter signed by sender. Will join him on Wednesday morning and go together. Has new result in astronomy.
Sender: John Frederick William Herschel Reference number: HS/2/402
Copy of letter, copied as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. Has had a long letter from Frederick Augustus (Duke of Sussex), who wishes him to accept a baronetcy. John Frederick William Herschel's comments on this.
19 June 1838 Sender: John Frederick William Herschel Reference number: HS/21/252Sir John Herschel serves his first term as President of the Royal Astronomical Society
1839: to 1841
Birth of Maria Sophia Herschel, daughter of John Frederick William Herschel and Margaret Brodie Stewart
1839
William Henry Fox Talbot presents his paper-based photographic process at the Royal Society
1839

Autograph letter signed by sender. Will bring Charles Babbage's 'Engine' to Slough tomorrow, together with Dionysius Lardner's apparatus, which Charles Babbage has 'taught to write.'
5 January 1839 Sender: Charles Babbage Reference number: HS/2/292
Autograph letter signed by sender. Making his last experiments on the morrow. Travels to and from Slough in the course of his experiments. Hopes John Frederick William Herschel will join him.
2 March 1839 Sender: Charles Babbage Reference number: HS/2/293Sir John Herschel publishes in the Philosophical Transactions
1840: Sir John Herschel publishes “On the chemical action of the rays of the solar spectrum on preparations of silver and other substances, both metallic and non-metallic; and on some photographic processes”

Autograph letter signed by sender. Regarding communications from Paddington. Gives verses written in honor of the 40-foot telescope. Has some strange results in photographic work.
10 January 1840 Sender: John Frederick William Herschel Reference number: HS/2/295Sir Robert Peel becomes Prime Minister
1841
Birth of Amelia Herschel, daughter of John Frederick William Herschel and Margaret Brodie Stewart
1841

Autograph letter signed by sender. Regarding a missing picture of his father.
29 September 1841 Sender: John Frederick William Herschel Reference number: HS/2/297
Autograph letter signed by sender. Regarding the missing picture [HS.2.297].
17 November 1841 Sender: Charles Babbage Reference number: HS/2/298
Autograph letter signed by sender. Please send on the picture. Hopes he had a good time in Italy.
20 November 1841 Sender: John Frederick William Herschel Reference number: HS/2/299
Autograph letter signed by sender. The Ryans are in London.
1841 ? Sender: John Frederick William Herschel Reference number: HS/2/365Birth of Julia Herschel, daughter of John Frederick William Herschel and Margaret Brodie Stewart
1842
Sir John Herschel publishes in the Philosophical Transactions
1842: Sir John Herschel publishes “On the action of the rays of the solar spectrum on vegetable colours, and on some new photographic processes”

Autograph letter signed by sender. Regarding his brother-in-law's sale of property. Sorry he was unable to meet him at Dover recently. Mother in good health.
12 February 1843 Sender: Charles Babbage Reference number: HS/2/301
Autograph letter signed by sender, incomplete. Regarding the deeds for Charles Babbage's brother-in-law. Is sorry that Charles Babbage could not see the blasting of the cliffs at Dover.
14 February 1843 Sender: John Frederick William Herschel Reference number: HS/2/302
Autograph letter signed by sender. Is sending him some new additions for the memoir by L. F. Menabrea. Mother keeps well.
21 November 1843 Sender: Charles Babbage Reference number: HS/2/303
Autograph letter signed by sender. Has had visitors which accounts for the delay in answering letter. Thanks for memoir additions. Is sending paper dealing with use of Charles Babbage's work. Somervilles are still in Rome. Is glad to hear good news of his mother.
1 December 1843 Sender: John Frederick William Herschel Reference number: HS/2/304
Autograph letter signed by sender. Sending him papers on his machine. Would like to see him when in town to discuss various matters. His youngest son has arrived in Calcutta.
2 December 1843 Sender: Charles Babbage Reference number: HS/2/305
Autograph letter signed by sender. Requests advice on the setting up of a sick benefit society. Remarks on some of Charles Babbage's queries.
20 December 1843 Sender: John Frederick William Herschel Reference number: HS/2/306
Autograph letter signed by sender. Referring him to someone who can advise him on the setting up of a sick benefit society. Regarding Charles Babbage's automan.
22 December 1843 Sender: Charles Babbage Reference number: HS/2/307Birth of Matilda Rose Herschel, daughter of John Frederick William Herschel and Margaret Brodie Stewart
1844

Autograph letter signed by sender. Regarding the health of his aunt and other family matters.
14 September 1844 Sender: John Frederick William Herschel Reference number: HS/2/309
Autograph letter signed by sender. She did wrong in letting him have John Frederick William Herschel's letter.
1844 Sender: Charles Babbage Reference number: HS/2/350
Autograph letter signed by sender. General family news.
Sender: Charles Babbage Reference number: HS/2/351
Sir John Herschel serves as President of the British Association
1845

Autograph letter signed by sender. Regarding the deed for Charles Babbage's brother-in-law. Is reading G. W. Leibniz's metaphysical works.
4 April 1845 Sender: John Frederick William Herschel Reference number: HS/2/310
Autograph letter signed by sender. Has just seen Lady Herschel and heard the news of his health. Urges him to come to town for treatment.
19 December 1845 Sender: Charles Babbage Reference number: HS/2/311
Autograph letter signed by sender. Health has improved. Regarding an experiment carried out at the Royal Institution.
20 December 1845 Sender: John Frederick William Herschel Reference number: HS/2/312Birth of Francisca Herschel, daughter of John Frederick William Herschel and Margaret Brodie Stewart
1846
Sir John Herschel serves his second term as Foreign Secretary of the Royal Astronomical Society
1846: To 1847
Sir John Herschel serves his second term as President of the Royal Astronomical Society
1847: Until 1849
Sir John Herschel receives the Copley Medal
1847: Sir John Herschel receives the Copley Medal of the Royal Society "For his work entitled Results of Astronomical Observations made during the years 1834, 1835, 1836, 1837 and 1838, at the Cape of Good Hope; being a completion of a telescopic survey of the whole surface of the visible heavens, commenced in 1825"
Sir John Herschel publishes a paper
1847: Sir John Herschel publishes Results of astronomical observations made during the years 1834, 5, 6, 7, 8, at the Cape of Good Hope; being a completion of a telescopic survey of the whole surface of the visible heavens, commenced in 1825.

Autograph letter signed by sender. Is thinking of publishing a new edition of Examples in the calculus of finite differences. Would like his views on this.
7 February 1847 Sender: John Frederick William Herschel Reference number: HS/2/313
Autograph letter signed by sender. Asks Charles Babbage's advice on how correctly to avoid attending a Queen's ball John Frederick William Herschel has been commanded to attend.
9 May 1847 Sender: John Frederick William Herschel Reference number: HS/2/314
Autograph letter signed by sender. Regarding the physical features of the moon.
8 June 1847 Sender: John Frederick William Herschel Reference number: HS/2/315
Autograph letter signed by sender. How to evade attending the Queen's ball. Thanks for information on the moon.
10 June 1847 Sender: Charles Babbage Reference number: HS/2/316
Autograph letter signed by sender. Remarks on John Frederick William Herschel's Southern astronomy volume [Cape Results].
19 August 1847 Sender: Charles Babbage Reference number: HS/2/317The Pre-Raphaelite Brotherhood is formed, by John Everett Millais, Dante Gabriel Rosetti and others
1848
Napoleon III is elected first President of France
20 December 1848

Autograph letter signed by sender. Regarding the originator of the Royal Astronomical Society Regarding his duties as trustee and other legal matters.
16 February 1848 Sender: John Frederick William Herschel Reference number: HS/2/318
Autograph letter signed by sender. Regarding the origins of the Royal Astronomical Society Will try and find a substitute trustee.
29 February 1848 Sender: Charles Babbage Reference number: HS/2/319
Autograph letter signed by sender. Thanks for his offer of help in the trusteeship. Also for his pamphlet on income tax. Is about to become involved in Chancery proceedings. Comments on tax.
1848 ? Sender: John Frederick William Herschel Reference number: HS/2/388Sir John Herschel publishes Outlines of Astronomy.
1849
Sir John Herschel is appointed Master of the Mint
1850
Sir John Herschel serves as juror of the Great Exhibition
1851

Autograph letter signed by sender. Would like a reference from him regarding a candidate for a position at the Mint. Would like him and David Brewster to dine with him.
6 May 1851 Sender: John Frederick William Herschel Reference number: HS/2/320
Autograph letter signed by sender. Please let him have David Brewster's address.
19 August 1851 Sender: John Frederick William Herschel Reference number: HS/2/321
Autograph letter signed by sender. Will show his friends round the Mint.
21 August 1851 Sender: John Frederick William Herschel Reference number: HS/2/322
Autograph letter signed by sender. Regarding his plans for lighthouses. Had a visit from L. F. Menabrea in his absence. Who manufactures the specified telescopes?
29 October 1851 Sender: Charles Babbage Reference number: HS/2/323
Autograph letter signed by sender. Further regarding lighthouses.
30 October 1851 Sender: John Frederick William Herschel Reference number: HS/2/324
Autograph letter signed by sender. Will he and David Brewster dine with him on Tuesday.
1851 to 1853 ? Sender: John Frederick William Herschel Reference number: HS/2/396
Autograph letter signed by sender. Does not wish to become a Vice-Patron of the College of Preceptors.
19 February 1852 Sender: John Frederick William Herschel Reference number: HS/2/325
Autograph letter signed by sender. Invitation to attend the wedding ceremony at St. James' Piccadilly [for the wedding of Caroline E. M. Herschel and Col. Alexander H. Gordon]
3 December 1852 Sender: John Frederick William Herschel Reference number: HS/2/326
Autograph letter signed by sender. Can he lend him the Cambridge Calendar or tell him the examiners in the mathematical tripos.
1852 ? Sender: John Frederick William Herschel Reference number: HS/2/379
Autograph letter signed by sender. Can he lend him Thomas Young's lectures?
Sender: John Frederick William Herschel Reference number: HS/2/380
Autograph letter signed by sender. Will visit him on Sunday if the weather is suitable.
Sender: John Frederick William Herschel Reference number: HS/2/381
Autograph letter signed by sender. Invitation to dine with him.
Sender: John Frederick William Herschel Reference number: HS/2/382
Autograph letter signed by sender. Will he send the drawing of St. Olave's? Has lost his red pocket book.
Sender: John Frederick William Herschel Reference number: HS/2/383
Autograph letter signed by sender. Sending an 'ill matched pair.' Has got a cold.
Sender: John Frederick William Herschel Reference number: HS/2/384
Autographed letter . Has some certificates for him to sign. Would he read the translation of C. F. Gauss's paper on Friday?
Sender: John Frederick William Herschel Reference number: HS/2/385
Autograph letter signed by sender. Will be pleased to dine with him. Has been unlucky of late.
Sender: John Frederick William Herschel Reference number: HS/2/386
Autograph letter signed by sender. Is returning his porisms. Comments on his geometrical language.
Sender: John Frederick William Herschel Reference number: HS/2/387
Autograph letter signed by sender. Hopes Charles Babbage will dine with John Frederick William Herschel at Hawkhurst next week as John Frederick William Herschel hears Charles Babbage will be in the neighborhood.
22 December 1853 Sender: John Frederick William Herschel Reference number: HS/2/327
Autograph letter signed by sender. Number of half-crowns minted in the years 1832-53.
1853 Sender: John Frederick William Herschel Reference number: HS/2/377
Autograph letter signed by sender. Is unable to dine with him as his rheumatism is too bad.
Sender: John Frederick William Herschel Reference number: HS/2/378
Autograph letter signed by sender. Send the names and addresses of any friends who may wish to see the Mint. Thanks for pamphlet on income tax.
1853 ? Sender: John Frederick William Herschel Reference number: HS/2/393
Autograph letter signed by sender. Will be spending a quiet weekend near Tring. Unable to attend Charles Babbage's Soirée.
Sender: John Frederick William Herschel Reference number: HS/2/394
Autograph letter signed by sender. Thanks for some article.
Sender: John Frederick William Herschel Reference number: HS/2/395
Autograph letter signed by sender. Sends John Frederick William Herschel a copy of a recent issue of the Athenaeum in which falsehoods, copied from a Richard Sheepshanks pamphlet, have been printed. Charles Babbage wants John Frederick William Herschel to respond to, and correct, these falsehoods quickly.
13 December 1854 Sender: Charles Babbage Reference number: HS/27/19
Contemporary copy in sender's hand, partly signed by sender, partly signed with sender's name by an amanuensis. Refuses to become a partisan in this conflict [see Charles Babbage's 1854-12-13]. John Frederick William Herschel would only become involved if he felt he could be a peacemaker.
15 December 1854 Sender: John Frederick William Herschel Reference number: HS/27/20Birth of Constance Anne Herschel, daughter of John Frederick William Herschel and Margaret Brodie Stewart
1855
Sir John Herschel is elected Foreign Associate of the Institut de France
1855
Sir John Herschel resigns from his position as Master of the Mint
1855

Autograph letter signed by sender. Regarding a suitable engraving of William Herschel to be added to William Walker's engraving of a meeting at the Royal Institution.
3 November 1857 Sender: Charles Babbage Reference number: HS/2/328
Autograph letter signed by sender. Wishes to introduce an American friend, Professor Stephen Alexander, to John Frederick William Herschel.
1858 Sender: Charles Babbage Reference number: HS/2/349
Autograph letter signed by sender. Advises him to put his house in the hands of a temporary tenant so that he can rest.
23 November 1859 Sender: Charles Babbage Reference number: HS/2/329
Autograph letter signed by sender. Has found a temporary tenant for his house.
4 December 1859 Sender: John Frederick William Herschel Reference number: HS/2/330Sir John Herschel publishes in the Proceedings of the Royal Society
1860: Sir John Herschel publishes some “Remarks on colour-blindness" extracted from a referee report on Pole’s paper on the same subject.
Death of Margaret Louisa Marshall, née Herschel, daughter of John Frederick William Herschel and Margaret Brodie Stewart
1861
William Morris established the decorative design firm of Morris, Marshall, Faulkner & Company (later Morris & Company)
1861
Charles Dickens publishes Great Expectations as a three-volume book
1861
Sir John Herschel publishes Physical Geography as part of the Encyclopaedia Britannica.
1861
Abraham Lincoln begins his term as President of the United States
4 March 1861

Autograph letter signed by sender. Is sending a book of travels by Mr. Tyler, which gives an account of the Mexican stone and flint implements. Alexander Herschel called. The latter's experiments with hydrogen are useful.
30 June 1861 Sender: Charles Babbage Reference number: HS/2/331
Autograph letter signed by sender. Regarding financial affairs. Is having trouble with his eyes. Has done little of late.
8 November 1862 Sender: John Frederick William Herschel Reference number: HS/2/332
Autograph letter signed by sender. Will John Frederick William Herschel and his son [William] come and dine with him this week?
15 February 1864 Sender: Charles Babbage Reference number: HS/2/333
Autograph letter signed by sender. Thanking him for his book [probably Passages in the Life of a Philosopher].
5 June 1864 Sender: John Frederick William Herschel Reference number: HS/2/334
Copy letter in John Herschel's hand. Gives Charles Babbage permission to publish the portions of letters requested by him. John Frederick William Herschel tells Charles Babbage that he has responded to John Davy's letter in the PM.
20 December 1864 Sender: John Frederick William Herschel Reference number: HS/27/26
Autograph letter signed by sender. Believes that John Davy's letter to the Philosophical Magazine was suggested by James South. To defend himself, Charles Babbage now needs John Frederick William Herschel's permission to publish some of their correspondence.
19 December 1864 Sender: Charles Babbage Reference number: HS/27/28
Autograph letter signed by sender. Commiserates with John Frederick William Herschel in his illness, and says Charles Babbage is ill also and confined to his house. Seeing John Frederick William Herschel's letter in the Philosophical Magazine [see John Frederick William Herschel's 1864-12-20] seems to Charles Babbage to obviate completely the need for any further response.
25 January 1865 Sender: Charles Babbage Reference number: HS/27/29
Autograph letter signed by sender, with annotations by recipient. Draws John Frederick William Herschel's attention to an article in the most recent Philosophical Magazine.
6 February 1865 Sender: Charles Babbage Reference number: HS/27/30Sir John Herschel publishes his translation of Homer’s Iliad
1866

Autograph letter signed by sender. Regarding the signing of a new document for Charles Babbage's sister. Has been reading John Frederick William Herschel's paper on the sun. Wishes he would print a list of all his papers.
29 September 1866 Sender: Charles Babbage Reference number: HS/2/335
Autograph letter signed by sender. Is returning the trust deed duly signed. A list of his papers was printed in an American periodical. Hopes his yachting improved his health. He is suffering from bronchitis. Trouble with the Irish.
October 1866 Sender: John Frederick William Herschel Reference number: HS/2/336Sir John Herschel publishes Familiar Lectures on Scientific Subjects
1867

Autograph letter signed by sender. News of the forthcoming marriage of his daughter. Everyone seems to be mad on making ice.
22 November 1867 Sender: John Frederick William Herschel Reference number: HS/2/389
Autograph letter signed by sender. Invitation to dine with him.
Sender: John Frederick William Herschel Reference number: HS/2/390
Autograph letter signed by sender. Is sorry to hear of his misfortunes. Regarding the Ryans.
Sender: John Frederick William Herschel Reference number: HS/2/391
Autograph letter signed by sender. Many thanks for the Adelaide sovereign. More will be welcome if they send them.
Sender: John Frederick William Herschel Reference number: HS/2/392Benjamin Disraeli becomes Prime Minister
1 February 1868
William Gladstone becomes Prime Minister
1 December 1868

Autograph letter signed by sender. Invitation to attend the wedding of John Frederick William Herschel's daughter Amelia.
15 July 1868 Sender: John Frederick William Herschel Reference number: HS/2/337