| RefNo | Title | Date |
| EC/1908/19 | Becquerel, Antoine Henri: certificate of election to the Royal Society | 4 June 1908 |
| NLB/21/338 | Copy letter from Michael Foster, to Antoine Henri Becquerel, [Fellow of the Royal Society] | 1 November 1900 |
| NLB/35/158 | Copy letter from Robert William Frederick Harrison, to Professor Wyndham Rowland Dunstan, Fellow of the Royal Society | 26 April 1907 |
| NLB/37/719 | Copy letter from Robert William Frederick Harrison to Sir William Crookes, Fellow of the Royal Society | 5 May 1908 |
| NLB/37/744 | Copy letter from Robert William Frederick Harrison to Professor [Frederick Thomas] Trouton, Fellow of the Royal Society | 7 May 1908 |
| AP/80/2 | Unpublished paper, 'An experimental inquiry undertaken with the view of ascertaining whether any and what influence is exerted by magnetic force over plants during vegetation' by [Henry Foster Baxter] | [1848-1856] |
| MC/15/188 | Letter from Henri Becquerel, Paris, to the President of the Royal Society | 28 May 1891 |
| MC/23/41 | Letter from Henri Becquerel, 6 Rue Dumont-D'Urville, Paris XVIe, to The Royal Society | 22 June 1908 |
| MS/603/1/74 | Letter from Henri Becquerel, 6me Dumont d'Urville, Paris, to [Joseph] Larmor | 5 July 1906 |
| MS/603/1/75 | Letter from Henri Becquerel, 6me Dumont d'Urville, Paris, to [Joseph] Larmor | 10 July 1906 |
| MS/663/1/13 | Letter from Henri Becquerel and Louise Becquerel, 6 Rue Dumont d'Urville, Paris, to [Arthur] Schuster and Caroline Schuster | 27 February 1902 |
| MS/663/1/12 | Letter from Henri Becquerel, 6 Rue Dumont d'Urville, Paris, to [Arthur] Schuster | 22 February 1902 |
| MS/663/1/14 | Letter from Henri Becquerel, 6 Rue Dumont d'Urville, Paris, to [Arthur] Schuster | 28 February 1902 |
| MS/663/1/15 | Letter from Henri Becquerel, London, to [Arthur] Schuster | 9 March 1902 |
| MS/663/1/16 | Letter from Henri Becquerel, 6 Rue Dumont d'Urville, Paris, to [Arthur] Schuster | 15 May 1902 |
| MS/663/1/18 | Letter from Henri Becquerel, 6 Rue Dumont d'Urville, Paris, to [Arthur] Schuster | 30 June 1904 |
| MS/663/1/17 | Letter from Henri Becquerel, 6 Rue Dumont d'Urville, Paris, to [Arthur] Schuster | 8 May 1904 |
| MS/663/1/19 | Letter from Henri Becquerel, Paris, to A [Arthur] Schuster, Manchester | 1 March 1905 |