Letter listing for 1830–1839
- Caroline Lucretia Herschel to Sir John Frederick William Herschel, 1st baronet of Slough, 11 June 1837
- Sir Roderick Impey Murchison to Reverend William Venables Vernon Harcourt, 26 June 1837
- John Phillips to Reverend William Venables Vernon Harcourt, 6 July 1837
- Reverend William Venables Vernon Harcourt to John Phillips, 9 July 1837
- Sir Roderick Impey Murchison to Reverend William Venables Vernon Harcourt, 11 July 1837
- Sir Francis Alexander Mackenzie of Gairloch, baronet to Sir Roderick Impey Murchison, 20 July 1837
- John Phillips to Reverend William Venables Vernon Harcourt, 10 August 1837
- Sir Roderick Impey Murchison to Reverend William Venables Vernon Harcourt, 20 August 1837
- John Phillips to Reverend William Venables Vernon Harcourt, 25 August 1837
- Reverend William Venables Vernon Harcourt to William Cavendish, 2nd earl of Burlington, 30 August 1837
- William Cavendish, 2nd earl of Burlington to Reverend William Venables Vernon Harcourt, 3 September 1837
- Reverend William Venables Vernon Harcourt to John Phillips, 4 September 1837
- Sir John Frederick William Herschel, 1st baronet of Slough to Caroline Lucretia Herschel, 7 September 1837
- Sir Roderick Impey Murchison to Reverend William Venables Vernon Harcourt, 18 September 1837
- Sir Roderick Impey Murchison to Charles Wentworth Dilke, 27 September 1837