| RefNo | Title | Date |
| NLB/15/533 | Copy letter from Robert William Frederick Harrison, to Sir John Evans, Treasurer, Royal Society | 22 October 1897 |
| NLB/9/253 | Copy letter from Herbert Rix, to Sir Robert Bell, Fellow of the Royal Society | 23 April 1894 |
| NLB/15/593 | Copy letter from Theodore E James, to Messrs Harrison & Sons | 2 November 1897 |
| NLB/15/543 | Copy letter from Robert William Frederick Harrison, to Dr Robert Bell, Fellow of the Royal Society, Geological Survey Office, Sussex Street, Ottawa, Canada | 25 October 1897 |
| NLB/15/532 | Copy letter from Robert William Frederick Harrison, to Dr Robert Bell, Fellow of the Royal Society | 22 October 1897 |
| NLB/15/694 | Copy letter from Robert William Frederick Harrison, to Dr Robert Bell, Fellow of the Royal Society, Geological Survey, Ottawa, Canada | 18 November 1897 |
| NLB/15/685 | Copy letter from Robert William Frederick Harrison, to Dr Robert Bell, Fellow of the Royal Society, Geological Survey Office, Sussex Street, Ottawa, Canada | 16 November 1897 |
| NLB/16/627 | Copy letter from Robert William Frederick Harrison, to Dr James Bell, Fellow of the Royal Society, Howell Hill Lodge, Ewell, Surrey | 9 May 1898 |
| NLB/29/838 | Copy letter from Joseph Larmor, to Sir Robert Bell, Fellow of the Royal Society | 20 December 1904 |
| NLB/34/592 | Copy letter from Robert William Frederick Harrison, to Sir Robert Bell, Fellow of the Royal Society, Observatory, Cambridge | [February 1907] |
| NLB/39/197 | Copy letter from Robert William Frederick Harrison to Harrison & Sons | 9 December 1908 |
| NLB/37/538 | Copy letter from Robert William Frederick Harrison to Dr R [Robert] Bell, Fellow of the Royal Society | 3 April 1908 |
| NLB/54/579 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Professor [Frank Dawson] Adams, FRS | 25 June 1917 |
| NLB/54/581 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Messrs Harrison & Sons | 25 June 1917 |
| EC/1897/07 | Bell, Robert: certificate of election to the Royal Society | |
| MS/427/341 | Copy letter from [Michael] Foster, Secretary of the Royal Society; to [Robert] Bell, Esq. 6 William Street, Lowndes Square | 9 February 1884 |
| EC/1897/08 | Bell, Robert: certificate of election to the Royal Society | |
| MC/19/58 | Letter from Robert Bell, Acting Deputy Head and Director, Geological Survey of Canada, Ottawa, to Robert [William Frederick] Harrison, Assistant Secretar of the Royal Society, London | 29 September 1904 |
| MC/21/36 | Letter from Robert Bell, Acting Deputy Head and Director of the Geological Survey of Canada, Ottawa, to the Treasurer of the Royal Society, Burlington House, London, England | 24 March 1906 |
| MC/19 | Volume 19 of miscellaneous correspondence regarding business matters, sent to the Royal Society | 1904 |
| MC/32/2 | Letter from Frank [Dawson] Adams, McGill University, Faculty of Applied Science, Montreal, to Robert [William Frederick] Harrison, The Royal Society, Burlington House, London, W | 21 August 1917 |
| MC/21 | Volume 21 of miscellaneous correspondence regarding business matters, sent to the Royal Society | 1906 |