| RefNo | Title | Date |
| EC/1858/05 | Forbes, David: certificate of election to the Royal Society | |
| IM/001488 | Forbes, David | nd |
| MC/5/356 | Letter from David Forbes, Copiapo, Chile, South America, to C R [Charles Richard] Weld, Assistant Secretary of the Royal Society | 31 August 1858 |
| MC/5 | Volume 5 of miscellaneous correspondence regarding business matters, sent to the Royal Society | 1851-1858 |
| MC/8/168 | Letter from David Forbes, 11 York Place, Portman Square, London, to W [William] Sharpey, Secretary of the Royal Society | 7 April 1868 |
| MC/8/150 | Letter from David Forbes, 11 York Place, Portman Square, London, to Dr [William] Sharpey, Secretary of the Royal Society | 2 March 1868 |
| MC/8/341 | Letter from David Forbes, 11 York Place, Portman Square, London, to Dr William Sharpey, Secretary of the Royal Society | 27 March 1869 |
| MC/10/466 | Letter from George Attwood [?], 11 York Place, Portman Square, to the Secretary of the Royal Society | 5 December 1876 |
| MC/10 | Volume 10 of miscellaneous correspondence regarding business matters, sent to the Royal Society | July 1873-1876 |
| RR/7/269 | Referee's report by David Forbes, on a paper 'On the composition and origin of the waters of a salt spring in Huel Seton Mine, with a chemical and microscopical examination of certain rocks in its vicinity' by John Arthur Phillips | 7 March 1873 |
| MC/8 | Volume 8 of miscellaneous correspondence regarding business matters, sent to the Royal Society | 1867-1869 |
| RR/7/386 | Referee's report by David Forbes, on a paper 'On the origin and mechanism of production of the prismatic (or columnar) structure of basalt' by Robert Mallet | 13 February 1875 |