| RefNo | Title | Date |
| MC/14/151 | Letter from R D Darbishire, 26 George Street, Manchester, to John Evans, Treasurer of the Royal Society | 13 September 1886 |
| NLB/5/45 | Copy letter from Herbert Rix, to Vernon Heath, Brunswick Hotel, Jermyn Street, S.W. | 26 February 1891 |
| NLB/5/67 | Copy letter from Herbert Rix, to John Evans, Treasurer, Royal Society | 6 March 1891 |
| M/226 | Whitworth, Sir Joseph Bart | |
| EC/1857/15 | Whitworth, Sir Joseph: certificate of election to the Royal Society | |
| MC/11/238 | Letter from J D [Joseph Dalton] Hooker, Royal Gardens, Kew, to [Walter] White, [Assistant Secretary of the Royal Society] | 7 July 1878 |
| MC/11 | Volume 11 of miscellaneous correspondence regarding business matters, sent to the Royal Society | 1877-1879 |
| MC/14/136 | Letter from Darbishire & Tatham, 26 George Street, Manchester, to John Evans, Treasurer of the Royal Society | 8 July 1886 |
| MC/14/135 | Letter from R D Darbishire, 26 George Street, Machester, to [John] Evans | 5 July 1886 |
| MC/15/134 | Letter from Vernon Heath, Brunswick Hotel, Jermyn Street, to Herbert Rix | 28 January 1891 |
| MC/15/155 | Letter from Vernon Heath, Brunswick Hotel, Jermyn Street, to Herbert Rix | 11 March 1891 |
| MC/14 | Volume 14 of miscellaneous correspondence regarding business matters, sent to the Royal Society | 1885-1888 |
| MC/15 | Volume 15 of miscellaneous correspondence regarding business matters, sent to the Royal Society | 1889-1892 |
| HS/18/403 | Letter, from Sir John Herschel to Joseph Whitworth, dated at Collingwood | 27 September 1862 |
| HS/23/387 | Copy letter, from Sir John Herschel to Joseph Whitworth, dated at Collingwood | 27 September 1862 |