| RefNo | Title | Date |
| EC/1937/08 | Hartley, Percival: certificate of election to the Royal Society | |
| MM/9/40 | Letter from CS Sherrington, Eastbourne, to Sir Hartley Percival | 15 November 1947 |
| MM/9/41 | Letter from CS Sherrington, Eastbourne, to Sir Hartley Percival | 9 January 1948 |
| RR/72/235 | Referee's report by Percival Hartley, on a paper 'The antigenic relationship of some mammalian spermatozoa' by Audrey U Smith | 1949 |
| RR/72/45 | Referee's report by Percival Hartley, on a paper 'The selective admission of antibodies to the foetus by the yolk-sac splanchnopleur in rabbits' by Francis William Rogers Brambell, W A Hemmings, Megan Henderson and W T Rowlands | 1949 |
| GLB/65/22/14 | Percival Hartley, Bigwood Road, London to Brown | 10 June 1955 |
| IM/GA/WS/1009 | Hartley, Percival | nd |
| RR/72/276 | Referee's report by Percival Hartley, on a paper 'The transplantation of normal tissues: with special reference to auto- and homotransplants of thyroid and spleen in the anterior chamber of the eye, and subcutaneously, in guinea-pigs' by Michael Francis Addison Woodruff and Hazel G Woodruff | 1949 |
| HD/25/21 | Presentation album for Henry Dale on his retirement from the National Institute for Medical Research | 30 September 1942 |
| RR/72/277 | Letter from Percival Hartley, on a paper 'The transplantation of normal tissues: with special reference to auto- and homotransplants of thyroid and spleen in the anterior chamber of the eye, and subcutaneously, in guinea-pigs' by Michael Francis Addison Woodruff and Hazel G Woodruff to David Brunt | 25 September 1949 |
| RR/74/46 | Referee's report by Percival Hartley, on a paper 'The route by which antibodies enter the circulation after injection of immune serum into the exocoel of foetal rabbits' by Francis William Rogers Brambell, Hemmings P Gwynneth, W A Hemmings, Megan Henderson and W T Rowlands | 21 September 1950 |
| RR/74/47 | Referee's report by Percival Hartley, on a paper 'The accumulation of antibodies in the stomach contents of foetal rabbits' by Francis William Rogers Brambell et al. | 21 September 1950 |
| RR/74/45 | Letter from Percival Hartley, on a paper 'The route by which antibodies enter the circulation after injection of immune serum into the exocoel of foetal rabbits' by Francis William Rogers Brambell, Hemmings P Gwynneth, W A Hemmings, Megan Henderson and W T Rowlands, to D C Martin | 21 September 1950 |
| RR/76/21 | Referee's report by Alan Nigel Drury, on a paper 'The effect of peptic digestion on the properties of diphtheria antitoxin' by Sir Percival Hartley | 30 March 1951 |
| RR/76/49 | Referee's report by Percival Hartley, on a paper 'Adaptation and Mendellian segregation in the utilization of galactose by yeast' by B C Kilkenny and Sir Cyril Hinshelwood | 10 August 1951 |
| RR/76/90 | Referee's report by Percival Hartley, on a paper 'Selective and non-selective admission of various antitoxins into foetal rabbits' by Francis William Rogers Brambell, W A Hemmings, Megan Henderson and C L Oakley | 10 January 1952 |