| RefNo | Title | Date |
| EC/1905/19 | Moissan, Henri: certificate of election to the Royal Society | |
| NLB/9/134 | Copy letter from Herbert Rix, to Professor Wyndham Rowland Dunstan, Fellow of the Royal Society | 4 April 1894 |
| NLB/13/89 | Copy letter from Robert William Frederick Harrison, to Monsieur le Professeur Henri Moissan, [Fellow of the Royal Society] | 8 June 1896 |
| NLB/13/308 | Copy letter from Robert William Frederick Harrison, to William Crookes, Fellow of the Royal Society | 23 July 1896 |
| NLB/13/696 | Copy letter from Edward Frankland, to Professor Henri Moissan | 5 November 1896 |
| NLB/13/691 | Copy letter from Lord Rayleigh [John William Strutt], to Horace Alfred Damer Seymour, Royal Mint | 5 November 1896 |
| NLB/16/770 | Copy letter from Michael Foster, to Professor H Moissan | 3 June 1898 |
| NLB/30/753 | Copy letter from Archibald Geikie, to Professor Hugo de Vries, Amsterdam, and Henri Moissan, Hendrik Antoon Lorentz and Ludimar Hermann, [Foreign Members, Royal Society] | 18 May 1905 |
| NLB/31/506 | Copy letter from Archibald Geikie, to Professor Henri Moissan, [Fellow of the Royal Society] | 2 October 1905 |
| NLB/32/698 | Copy letter from Lord Rayleigh [John William Strutt], to Professor Henri Moissan, Foreign Member of the Royal Society, Faculte des Sciences a la Sorbonne, Paris [France] | 2 May 1906 |
| MS/373/1/12 | Letter from Henri Moissan, Laboratoire de Toxicologie, Ecole Superieure de Pharmacie, Avenue de l'Observatoire 4, Paris, to [Thomas Edward Thorpe] | 24 June 1889 |
| MC/20 | Volume 20 of miscellaneous correspondence regarding business matters, sent to the Royal Society | 1905 |
| MC/20/193 | Letter from Henri Moissan, Universite de Paris, La Sorbonne, to the Secretary of the Royal Society | 29 March 1905 |
| MC/20/194 | Letter from Henri Moissan, Universite de Paris, La Sorbonne, to the Royal Society | 20 May 1905 |
| MC/20/195 | Letter from Henri Moissan, Universite de Paris, La Sorbonne, to the President of the Royal Society | 22 June 1905 |