| Reference number | Title | Date |
| EC/1926/11 | Christophers, Sir Samuel Rickard: certificate of election to the Royal Society | |
| NLB/19/383 | Copy letter from Theodore E James, to Professor Edwin Ray Lankester, Fellow of the Royal Society | 9 September 1899 |
| IM/GA/WS/1324 | Christophers, Sir Samuel Rickard | nd |
| NLB/20/466 | Copy letter from an unknown correspondent, to Professor Edwin Ray Lankester, Fellow of the Royal Society | 28 April 1900 |
| NLB/23/1/101 | Copy letter from Robert William Frederick Harrison, to Dr Samuel Rickard Christophers, [Fellow of the Royal Society] | 20 September 1901 |
| NLB/19/714 | Copy letter from Robert William Frederick Harrison, to Dr Samuel Rickard Christophers, [Fellow of the Royal Society] | 1 December 1899 |
| NLB/17/497 | Copy letter from the Royal Society, to Dr Samuel Rickard Christophers, 25 Brompton Avenue, Sefton Park, Liverpool | [9 November 1898] |
| NLB/19/158 | Copy letter from an unknown correspondent, to Sir Michael Foster, Secretary, Royal Society | 30 June 1899 |
| NLB/17/520 | Copy telegram from Robert William Frederick Harrison, to Dr Samuel Rickard Christophers, [Fellow of the Royal Society] | [11 November 1898] |
| NLB/17/257 | Copy letter from Robert William Frederick Harrison, to the Under Secretary of State, Colonial Office, S.W. | 23 September 1898 |
| NLB/17/255 | Copy letter from Robert William Frederick Harrison, to Dr Samuel Rickard Christophers, [Fellow of the Royal Society], 25 Brompton Avenue, Sefton Park, Liverpool | 24 September 1898 |
| NLB/17/535 | Copy telegram from Robert William Frederick Harrison, to Samuel Rickard Christophers, [Fellow of the Royal Society], 25 Brompton Avenue, Sefton park, Liverpool | [14 November 1898] |
| NLB/17/509 | Copy letter from Robert William Frederick Harrison, to Dr Samuel Rickard Christophers, Central Hotel, Glasgow | [10 November 1898] |
| NLB/17/643 | Copy letter from Robert William Frederick Harrison, to Dr John William Watson Stephens, [Fellow of the Royal Society], Pathological Laboratory, Cambridge | 29 November 1898 |
| NLB/17/635 | Copy letter from Robert William Frederick Harrison, to the Crown Agents for the Colonies, Downing Street, S.W. | 29 November 1898 |
| NLB/17/578 | Copy letter from Robert William Frederick Harrison, to C P Lucas, Colonial Office, S.W. | 21 November 1898 |
| NLB/17/637 | Copy letter from Robert William Frederick Harrison, to C P Lucas, Colonial Office | 29 November 1898 |
| NLB/17/703 | Copy letter from Robert William Frederick Harrison, to Dr Samuel Rickard Christophers, [Fellow of the Royal Society], Euston Hotel | 9 December 1898 |
| NLB/19/270 | Copy letter from Robert William Harrison, to Sir John Kirk, Fellow of the Royal Society | 24 July 1899 |
| NLB/19/84 | Copy letter from Robert William Frederick Harrison, to C P Lucas, Colonial Office, Downing Street, S.W. | 16 June 1899 |
| NLB/19/647 | Copy telegram from Robert William Frederick Harrison, to Dr John William Watson Stephens, [Fellow of the Royal Society], care of Woodhead, Pathological Laboratory, Cambridge | [16 November 1899] |
| NLB/19/274 | Copy letter from Robert William Harrison, to Mr Lucas, Colonial Office | 25 July 1899 |
| NLB/20/16 | Copy letter from Robert William Frederick Harrison, to C P Lucas, Colonial Office | 15 January 1900 |
| NLB/19/620 | Copy letter from Robert William Frederick Harrison, to Professor Edwin Ray Lankester, Fellow of the Royal Society | 10 November 1899 |
| NLB/19/591 | Copy letter from Robert William Frederick Harrison, to Sir John Kirk, Fellow of the Royal Society | 7 November 1899 |
| NLB/19/572 | Copy letter from Robert William Frederick Harrison, to Professor Thomas Clifford Allbutt, Fellow of the Royal Society | 2 November 1899 |
| NLB/19/725 | Copy letter from Robert William Frederick Harrison, to the Under Secretary of State, Colonial Office, S.W. | 4 December 1899 |
| NLB/19/638 | Copy letter from Robert William Frederick Harrison, to Sir John Scott Burdon-Sanderson, Fellow of the Royal Society | 15 November 1899 |
| NLB/20/591 | Copy letter from Robert William Frederick Harrison, to Lord Joseph Lister, President, Royal Society | 26 May 1900 |
| NLB/20/635 | Copy letter from Robert William Frederick Harrison, to Sir John Kirk, Fellow of the Royal Society | 6 June 1900 |
| NLB/21/131 | Copy letter from Theodore E James, to Dr Samuel Rickard Christophers, [Fellow of the Royal Society], Lagos | 13 August 1900 |
| NLB/20/617 | Copy letter from Robert William Frederick Harrison, to Professor Thomas Clifford Allbutt, Fellow of the Royal Society | 1 June 1900 |
| NLB/20/719 | Copy letter from Michael Foster to Dr John William Watson Stephens and [Samuel Rickard] Christophers, [Fellows of the Royal Society | 21 June 1900 |
| NLB/21/535 | Copy telegram from Michael Foster, to Samuel Rickard Christophers, [Fellow of the Royal Society], Pathological Laboratory, New Museums, Cambridge | [5 December 1900] |
| NLB/23/1/97 | Copy telegram from an unknown correspondent, to Dr [Samuel Rickard] Christophers, [Fellow of the Royal Society] | 19 September 1901 |
| NLB/23/1/153 | Copy letter from Robert William Frederick Harrison, to Dr Samuel Rickard Christophers, [Fellow of the Royal Society] | 2 October 1901 |
| NLB/23/1/393 | Copy letter from Sir Michael Foster, to John William Watson Stephens and Samuel Rickard Christophers, [Fellows of the Royal Society] | 6 November 1901 |
| NLB/24/138 | Copy letter from Sir Michael Foster, to The Right Honorable J Chamberlain MP, H M Secretary of State for the Colonies | 10 March 1902 |
| NLB/25/518 | Copy letter from Robert William Frederick Harrison, to Dr Samuel Rickard Christophers, [Fellow of the Royal Society] | 13 November 1902 |
| NLB/26/274 | Copy letter from Sir Michael Foster to, C P Lucas | 20 February 1903 |
| NLB/69/629 | Copy letter from Henry Hallett Dale, Secretary of the Royal Society; to Colonel [Samuel Rickard] Christophers | 30 June 1926 |
| NLB/69/678 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Lieut-Colonel [Samuel Rickard] Christophers, C.I.E., FRS | 14 July 1926 |
| NLB/24/148 | Copy letter from Michael Foster, to Dr [Samuel Rickard] Christophers, [Fellow of the Royal Society] | 10 March 1902 |
| NLB/19/290 | Copy letter from Michael Foster, to Dr C W Daniels, Blantyre, British Central Africa | 28 July 1899 |
| NLB/19/289 | Copy letter from Michael Foster, to Dr James William Watson Stephens and Dr Samuel Rickard Christophers, [Fellows of the Royal Society], Blantyre, British Central Africa | 28 July 1899 |
| NLB/20/114 | Copy letter from Robert William Frederick Harrison, to Sir John Kirk, Professor Edwin Ray Lankester, Professor Thomas Clifford Allbutt, Sir John Scott Burdon-Sanderson, Fellows of the Royal Society and members of the Malaria Committee | 5 February 1900 |
| NLB/23/1/573 | Copy letter from Michael Foster and copy memorandum from the Malaria Committee, to [John William Waton] Stephens and [Samuel Rickard] Christophers, [Fellows of the Royal Society] | 2 December 1901 |