| RefNo | Title | Date |
| IM/Maull/003997 | Salvin, Osbert | nd |
| NLB/14/668 | Copy letter from Robert William Frederick Harrison, to Osbert Salvin, Fellow of the Royal Society | 27 April 1897 |
| NLB/6/598 | Copy letter from Herbert Rix, to Osbert Salvin, Fellow of the Royal Society | 8 June 1892 |
| NLB/6/520 | Copy letter from Herbert Rix, to Osbert Salvin, Fellow of the Royal Society | 26 May 1892 |
| NLB/6/441 | Copy letter from Herbert Rix, to Osbert Salvin, Fellow of the Royal Society | 13 May 1892 |
| NLB/10/542 | Copy letter from Herbert Rix, to Messrs Harrison & Sons | 14 December 1894 |
| NLB/12/458 | Copy letter from Herbert Rix, to Osbert Salvin, Fellow of the Royal Society | 21 February 1896 |
| NLB/10/879 | Copy letter from Dr Michael Foster, to Frederick Du Cane Godman and Osbert Salvin, Fellows of the Royal Society | 22 February 1895 |
| NLB/12/169 | Copy letter from Herbert Rix, to Osbert Salvin, Fellow of the Royal Society | 23 December 1895 |
| NLB/14/637 | Copy letter from Robert William Frederick Harrison, to Messrs Harrison & Sons | 13 April 1897 |
| NLB/16/330 | Copy letter from Michael Foster, to Osbert Salvin, Fellow of the Royal Society | 18 March 1898 |
| NLB/13/426 | Copy letter from Theodore E James, to Professor Michael Foster, Secretary, Royal Society | 1 September 1896 |
| NLB/14/867 | Copy letter from Robert William Frederick Harrison, to Osbert Salvin, Fellow of the Royal Society | 29 May 1897 |
| NLB/14/853 | Copy letter from an unknown correspondent, to Messrs Harrison & Sons | 28 May 1897 |
| NLB/15/389 | Copy letter from Theodore E James, to Messrs Harrison & Sons | 13 September 1897 |
| NLB/16/765 | Copy letter from an unknown correspondent, to Messrs Harrison & Sons | 3 June 1898 |
| NLB/18/291 | Copy letter from Robert William Frederick Harrison, to Professor A Newton, Fellow of the Royal Society | 20 February 1899 |
| RR/9/43 | Referee's report by Osbert Salvin, on a paper 'The prehensores of male butterflies of the genera Ornithoptera and Papilo' by Philip Henry Gosse | 30 January 1882 |
| NLB/65/82 | Copy letter from William Bate Hardy, Secretary of the Royal Society; to Sir Sidney [Frederic] Harmer, KBE, FRS | 25 July 1923 |
| NLB/3/721 | Copy letter from Herbert Rix, to the Secretary of The Pasteur Fund, Mansion House | 24 September 1889 |
| NLB/11/430 | Copy letter from an unknown correspondent, to Sir Joseph Dalton Hooker, Professor Edwin Ray Lankester, Osbert Salvin, and Sir William Henry Flower, Fellows of the Royal Society | 26 June 1895 |
| NLB/15/560 | Copy letter from Arthur Wiliam Rucker, to Mr Osbert Salvin, [Fellow of the Royal Society] | 28 October 1897 |
| NLB/15/618 | Copy letter from Arthur William Rucker, to Osbert Salvin, Fellow of the Royal Society | 4 November 1897 |
| EC/1873/14 | Salvin, Osbert: certificate of election to the Royal Society | |
| RR/12/43 | Referee's report by Osbert Salvin, on a paper 'On the mimetic forms of certain butterflies of the genus Hypolimnas' by C Swinhoe | 2 June 1893 |