| RefNo | Title | Date |
| EC/1825/09 | Bessel, Friedrich Wilhelm: certificate of election to the Royal Society | |
| MC/1/287 | Letter from Captain Edward Sabine, Charlemont Street [Dublin], to Davies Gilbert | 3 March 1831 |
| MC/1/285 | Letter from Francis Baily, 37 Tavistock Place, to Davies Gilbert | 25 February 1831 |
| MC/2 | Volume 2 of miscellaneous correspondence regarding business matters, sent to the Royal Society | 1832-1838 |
| MC/2/76 | Letter from Professor [Stephen Peter] Rigaud, Observatory Oxford, to John William Lubbock, Treasurer of the Royal Society | 12 April 1833 |
| MC/1 | Volume 1 of miscellaneous correspondence regarding business matters, sent to the Royal Society | 1800-1831 |
| HS/4/82 | Letter, from Friedrich Wilhelm Bessel to Sir John Herschel, dated at Königsberg | 22 January 1844 |
| HS/4/69a | Translation of letter, from Friedrich Wilhelm Bessel to Sir John Herschel, dated at Königsberg | [4 July 1834] |
| HS/4/79 | Letter, from Friedrich Wilhelm Bessel to Sir John Herschel, dated at Königsberg | 14 November 1842 |
| HS/4/77 | Letter, from Friedrich Wilhelm Bessel to Sir John Herschel, dated at 32 Norfolk St. | 16 July 1842 |
| HS/4/75 | Letter, from Friedrich Wilhelm Bessel to Sir John Herschel, dated at Manchester | 25 June 1842 |
| HS/4/81 | Letter, from Friedrich Wilhelm Bessel to Sir John Herschel, dated at Königsberg | 20 June 1843 |
| HS/4/67 | Letter, from Friedrich Wilhelm Bessel to Sir John Herschel, dated at Königsberg | 6 July 1822 |
| HS/4/78 | Letter, from Friedrich Wilhelm Bessel to Sir John Herschel, dated at 32 Norfolk St. | 19 July 1842 |
| HS/4/71 | Letter, from Friedrich Wilhelm Bessel to Sir John Herschel, dated at Königsberg | 9 October 1838 |
| HS/4/76 | Letter, from Friedrich Wilhelm Bessel to Sir John Herschel, dated at Edinburgh | 5 July 1842 |
| HS/4/66a | Translation of letter, from Friedrich Wilhelm Bessel to Sir John Herschel, dated at Königsberg | [2 May 1822] |
| HS/4/74 | Letter, from Friedrich Wilhelm Bessel to Sir John Herschel, dated at Königsberg | 18 April 1840 |
| HS/4/68 | Letter, from Friedrich Wilhelm Bessel to Sir John Herschel, dated at Königsberg | 26 June 1828 |
| HS/4/67a | Translation of letter, from Friedrich Wilhelm Bessel to Sir John Herschel, dated at Königsberg | [6 July 1822] |
| HS/22/127 | Copy letter, from Sir John Herschel to Friedrich Wilhelm Bessel, dated at Collingwood | 8 July 1842 |
| HS/21/265 | Copy letter, from Sir John Herschel to Friedrich Wilhelm Bessel, dated at Slough | 24 October 1838 |
| HS/22/155 | Copy letter, from Sir John Herschel to Friedrich Wilhelm Bessel, dated at London | 5 June 1843 |
| HS/22/35 | Copy letter, from Sir John Herschel to Friedrich Wilhelm Bessel, dated at Slough | 29 December 1839 |
| HS/20/128 | Copy letter, from Sir John Herschel to Friedrich Wilhelm Bessel, dated at Slough | 17 November 1821 |
| HS/20/94 | Copy letter, from Sir John Herschel to Friedrich Wilhelm Bessel, dated at Slough | 9 May 1820 |
| HS/22/129 | Copy letter, from Sir John Herschel to Friedrich Wilhelm Bessel, dated at Collingwood | 20 July 1842 |
| HS/22/202 | Copy letter, from Sir John Herschel to Friedrich Wilhelm Bessel, dated at Collingwood | 28 July 1844 |
| HS/22/119 | Copy letter, from Sir John Herschel to Friedrich Wilhelm Bessel, dated at Collingwood | June 1842 |
| HS/20/151 | Copy letter, from Sir John Herschel to Friedrich Wilhelm Bessel, dated at Astronomical Society | 7 August 1822 |
| HS/4/69 | Letter, from Friedrich Wilhelm Bessel to Sir John Herschel, dated at Königsberg | 4 July 1834 |
| HS/4/66 | Letter, from Friedrich Wilhelm Bessel to Sir John Herschel, dated at Königsberg | 2 May 1822 |
| HS/4/70 | Letter, from Friedrich Wilhelm Bessel to Sir John Herschel, dated at Königsberg | 5 June 1838 |
| HS/4/72 | Letter, from Friedrich Wilhelm Bessel to Sir John Herschel, dated at Königsberg | 4 November 1838 |
| HS/4/73 | Letter, from Friedrich Wilhelm Bessel to Sir John Herschel, dated at Königsberg | 26 June 1839 |
| HS/4/80 | Letter, from Friedrich Wilhelm Bessel to Sir John Herschel, dated at Königsberg | 17 February 1843 |
| HS/4/83 | Letter, from Friedrich Wilhelm Bessel to Sir John Herschel, dated at Königsberg | 10 October 1844 |
| HS/19/1 | Summaries of letters between Sir John Frederick William Herschel and Friedrich Wilhelm Bessel | 1821-1822 |
| HS/19/26 | Copy letter, from Sir John Herschel to Friedrich Wilhelm Bessel, dated at Astronomical Society | 7 August 1822 |
| HS/19/70 | Copy letter, from Sir John Herschel to Friedrich Wilhelm Bessel, dated at Feldhausen | 16 May 1835 |
| HS/25/3/13 | Copy letter, from Sir John Herschel to Friedrich Wilhelm Bessel, dated at Slough | 17 April 1833 |
| HS/25/4/10 | Copy letter, from Sir John Herschel to Friedrich Wilhelm Bessel, dated at Feldhausen | 16 May 1835 |