| Reference number | Title | Date |
| IM/Maull/000833 | Cheyne, William Watson | nd |
| NLB/10/192 | Copy letter from Theodore E James, to Messrs Harrison & Sons | 18 October 1894 |
| NLB/23/2/244 | Copy letter from Sir Michael Foster, to Professor William Watson Cheyne, Fellow of the Royal Society | 23 July 1902 |
| NLB/22/165 | Copy letter from Robert William Frederick Harrison, to [William] Watson Cheyne, Fellow of the Royal Society | 15 March 1901 |
| NLB/24/239 | Copy letter from Sir Michael Foster, to Professor William Watson Cheyne, Fellow of the Royal Society | 9 April 1902 |
| NLB/24/136 | Copy letter from Robert William Frederick Harrison, to William Watson Cheyne, Fellow of the Royal Society | 10 March 1902 |
| NLB/41/434 | Copy letter from Robert William Frederick Harrison, to Sir William Watson Cheyne, Fellow of the Royal Society | 13 December 1909 |
| NLB/41/391 | Copy letter from Robert William Frederick Harrison, to Sir William Watson Cheyne, Fellow of the Royal Society | 6 December 1909 |
| NLB/45/348 | Copy letter from Robert William Frederick Harrison to Sir W [William] Watson Cheyne Bart CB, FRS | 17 February 1912 |
| NLB/45/538 | Copy letter from Robert William Frederick Harrison to Sir W [William] Watson Cheyne Bart FRS | 23 March 1912 |
| NLB/45/365 | Copy letter from Robert William Frederick Harrison to Sir W [William] W [Watson] Cheyne, Bart, CB, FRS | 23 February 1912 |
| NLB/66/309 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Sir [William] Watson Cheyne, Bart., FRS | 7 April 1924 |
| NLB/67/700 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to P. Thompson Esq.; Essex Museum of Natural History, Romford Road, E.15. | 18 February 1925 |
| IM/000834 | Cheyne, William Watson | nd |
| RR/17/197 | Referee's report by William Watson Cheyne, on a paper 'The rôle of the various elements in the development and regeneration of bone' by William Macewen | [March 1907] |
| NLB/37/77 | Copy letter from Robert William Frederick Harrison to Professor W [William] Watson Cheyne FRS | 21 January 1908 |
| NLB/36/839 | Copy letter from Robert William Frederick Harrison, to Professor William Watson Cheyne, Fellow of the Royal Society | 27 December 1907 |
| EC/1894/09 | Cheyne, Sir William Watson: certificate of election to the Royal Society | |