| RefNo | Title | Date |
| IM/GA/WS/1980 | Boswell, Percy George Hamnell | ? 1946 |
| MS/811 | Correspondence and papers on African palaeontology collected by Percy George Hamnall Boswell | 1932-1937 |
| MC/31/19 | Letter from [Percy George Hamnal] Boswell, Imperial College of Science and Technology (Royal School of Mines), Geology Department, South Kensington, London, S.W, to The [Assistant] Secretary, Royal Society | 6 June 1916 |
| NLB/52/515 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Percy George Hamnall Boswell Esquire; Imperial College of Science, South Kensington | 4 January 1916 |
| NLB/52/671 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Percy George Hamnall Boswell Esquire; Imperial College of Science, South Kensington | 9 February 1916 |
| RR/64/24 | Referee's report by Percy George Hamnall Boswell, on a paper 'The geological history of the Lake Rudolf Basin, Kenya colony' by Vivian Ernest Fuchs | [[November 1937] |
| RR/69/244 | Referee's report by Percy George Hamnall Boswell, on a paper 'Studies of the post-Glacial History of British vegetation VII. Lake sediments: Pollen diagrams from the bottom deposits of the North Basin of Windermere' by Winifred Pennington | 1946 |
| RR/70/65 | Referee's report by Percy George Hamnall Boswell, on a paper Studies in the 'Post-glacial history of British vegetation. VIII Swamping surfaces in peats of the Somerset Levels IX. Prehistoric trackways in the Somerset Levels' by Arthur Roy Clapham and Harry Godwin | 30 August 1947 |
| EC/1931/01 | Boswell, Percy George Hamnall: certificate of election to the Royal Society | |
| RR/67/191 | Referee's report by Percy George Hamnall Boswell, on a paper 'Studies of the post-glacial history of British vegetation - III. Fenland polen diagrams - IV. Post-glacial changes of relative land- and sea-level in the English Fenland' by Harry Godwin | 18 August 1939 |
| RR/66/42 | Referee's report by Percy George Hamnall Boswell, on a paper 'Seismic investigations on the Palaeozoic floor of east England' by Edward Crisp Bullard, T F Gaskell, W B Harland and C Kerr-Grant | [November 1939] |
| RR/65/103 | Referee's report by Percy George Hamnall Boswell, on a paper 'Studies of the post-glacial history of British vegetation I. Origin and stratigraphy of Fenland deposits near Wooldwalton, Hunts II. Origin and stratigraphy of deposits in southern Fenland' by Harry Godwin and M H Clifford | 30 April 1938 |
| RR/76/29 | Referee's report by Percy George Hamnall Boswell, on a paper 'Late-glacial deposits at Nazeing in the Lea Valley North London' by Jean Allison, Harry Godwin and S H Warren | 14 May 1951 |