| RefNo | Title | Date |
| IM/Maull/003835 | Rivers, William Halse Rivers | nd |
| NLB/23/1/602 | Copy letter from Michael Foster, to Dr William Halse Rivers Rivers, [Fellow of the Royal Society], St John's College, Cambridge | 10 December 1901 |
| NLB/27/98 | Copy letter from Robert William Frederick Harrison, to Dr William Halse Rivers Rivers, [Fellow of the Royal Society], St Johns College, Cambridge | 30 June 1903 |
| NLB/39/640 | Copy letter from Robert William Frederick Harrison to Harrison & Sons | 18 February 1909 |
| NLB/39/643 | Copy letter from Robert William Frederick Harrison to Harrison & Sons | 18 February 1909 |
| NLB/62/917 | Copy letter from [Francis Alexander Towle, Assistant Secretary of the Royal Society]; to the Editor of 'The Morning Post' | 7 June 1922 |
| NLB/37/334 | Copy letter from Robert William Frederick Harrison to Edward Arnold, 41 & 43 Maddox Street, W | 3 March 1908 |
| NLB/37/871 | Copy Letter from Robert William Frederick Harrison to W [William] Barlow, Fellow of the Royal Society | 26 May 1908 |
| NLB/40/450 | Copy letter from Robert William Frederick Harrison to Dr W [William Halse Rivers] Rivers FRS | 9 June 1909 |
| NLB/40/361 | Copy letter from Robert William Frederick Harrison to Dr W [William] H [Halse] R [Rivers] Rivers FRS, St John's College, Cambridge | 27 May 1909 |
| NLB/40/554 | Copy letter from Robert William Frederick Harrison to Dr W [William] H [Halse] R [Rivers] Rivers FRS | 25 June 1909 |
| NLB/42/245 | Copy letter from John Rose Bradford, Secretary RS [Secretary of the Royal Society] to Sir H Llewellyn Smith, KBC, Permanent Secretary, Marine Department of the Board of Trade, 7 Whitehall Gardens, SW | 29 April 1910 |
| NLB/41/375 | Copy letter from Robert William Frederick Harrison, to Dr William Halse Rivers, Fellow of the Royal Society | 2 December 1909 |
| NLB/44/723 | Copy letter from Robert William Frederick Harrison to Dr W [Willaim] H [Halse] R [Rivers] Rivers FRS | 27 October 1911 |
| NLB/52/366 | Copy letter from Arthur Schuster, Secretary of the Royal Society; to Sir William Halse Rivers Rivers, FRS | 11 November 1915 |
| NLB/52/335 | Copy letter from Arthur Schuster, Secretary of the Royal Society; to The Keeper of His Majesty's Privy Purse | 11 November 1915 |
| NLB/58/596 | Copy letter from Edwin Deller, Assistant Secretary of the Royal Society; to Dr. [William Halse Rivers] Rivers, FRS | 28 May 1920 |
| NLB/58/957 | Copy letter from Edwin Deller, Assistant Secretary of the Royal Society; to Dr. [William Halse Rivers] Rivers, FRS | 9 July 1920 |
| RR/18/111 | Referee's report by William Halse Rivers, on a paper 'A confusion-test for colour-blindness' by George James Burch | February 1912 |
| RR/20/105 | Referee's report by William Halse Rivers, on a paper 'Negative after-images and successive contrast with pure spectral colours' by Alfred William Porter and F W Edridge-Green | April 1913 |
| NLB/57/448 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Dr WHR [William Halse Rivers] Rivers, FRS | 10 November 1919 |
| NLB/57/545 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Dr WHR [William Halse Rivers] Rivers, FRS | 1 December 1919 |
| NLB/57/613 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Dr WHR [William Halse River] Rivers, FRS | 16 December 1919 |
| NLB/63/32 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Dr. Henry Head, FRS | 15 June 1922 |
| EC/1908/14 | Rivers, William Halse Rivers: certificate of election to the Royal Society | |
| NLB/52/329 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to The Deputy Master of the [Royal] Mint | 11 November 1915 |
| RR/19/46 | Referee's report by William Halse Rivers Rivers, on a paper 'Trichromic vision and anomalous trichromatism' by F W Edridge-Green | [December 1912] |
| NLB/56/338 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Henry Balfour Esquire, FRS | 15 January 1919 |
| NLB/56/341 | Copy letter from William Bate Hardy, Secretary of the Royal Society; to the Right Honourable Lord Milner | 16 January 1919 |