| Reference number | Title | Date |
| EC/1831/02 | Grey Egerton, Sir Philip de Malpas: certificate of election to the Royal Society | |
| MC/6/268 | Letter from Joseph Bonomi, Sir John Soane's Museum, 13 Lincoln's Inn Fields, to Wm [William] Sharpey, [Secretary of the Royal Society] | 12 December 1862 |
| IM/001253 | Grey Egerton, Sir Philip de Malpas | nd |
| RR/3/98 | Referee's report by Hugh Falconer, on a paper 'On chondrosteus, an extinct genus of the sturionidæ, found in the lias formation at Lyme Regis' by Phillip de Malpas Grey Egerton | 12 June 1858 |
| RR/3/174 | Referee's report by Philip de Malpas Grey Egerton, on a paper 'Description of some remains of a gigantic land-lizard (Megalama Prisca, Owen) from Australia' by Richard Owen | 18 October 1858 |
| RR/7/47 | Referee's report by Philip de Malpas Grey Egerton, on a paper 'On the fossil mammals of Australia - Part IV. Dentition and mandible of thylacoleo carnifex, with remarks on the arguments for its herbivority' by Richard Owen | 19 December 1870 |
| RR/7/128 | Referee's report by Philip De Malpas Grey Egerton, on a paper 'On the fossil mammals of Australia - Part V. Genus nototherium' by Richard Owen | 4 July 1871 |
| RR/7/125 | Letter from Philip de Malpas Grey Egerton, on a paper 'On the fossil mammals of Australia.—Part IV. Dentition and mandible of thylacoleo carnifex, with remarks on the arguments for its herbivority' by Richard Owen | 22 February 1871 |
| RR/6/205 | Referee's report by Philip de Malpas Grey-Egerton, on a paper 'On fossil remains of equines from central and South America referable to Equus conversidens, Ow., Equus tan, Ow., and Equus arcidens, Ow' by Richard Owen | 2 April 1869 |
| RR/7/189 | Referee's report by Philip Des Malpas Grey Egerton, on a paper 'On the fossil mammals of Australia - Part VI. Genus phascolomys' by Richard Owen | 29 May 1872 |
| RR/3/97 | Referee's report by Richard Owen, on a paper 'On chondrosteus, an extinct genus of the sturionidæ, found in the lias formation at Lyme Regis' by Phillip de Malpas Grey Egerton | 11 June 1858 |
| RR/7/190 | Memorandum by Philip Des Malpas Grey Egerton, on a paper 'On the fossil mammals of Australia - Part VI. Genus phascolomys' by Richard Owen | 1872 |
| MS/426/459 | Copy letter from C. R. [Charles Richard] Weld, the Assistant Secretary of the Royal Society, to G, Bailey Esq | 7 February 1852 |
| IM/Maull/001252 | Grey Egerton, Sir Philip de Malpas | nd |
| RR/7/46 | Referee's report by Philip de Malpas Grey Egerton, on a paper 'On the fossil mammals of Australia - Part III. Diprotodon australis' by Richard Owen | 19 March 1870 |
| MC/12/183 | Letter from [?] L Donaldson, chairman, Sir John Soane's Museum, 13 Lincoln's Inn Fields, to the Secretary of the Royal Society | 20 June 1881 |
| RR/3/209 | Referee's report by Philip de Malpas Egerton, on a paper 'Description of the skull and teeth of the placodus laticeps, owen, with indications of other new species of placodus, and evidence of the saurian nature of that genus' by Richard Owen | 25 March 1858 |
| RR/4/195 | Referee's report by Philip de Malpas Grey Egerton, on a paper 'On the dicynodont reptilia, with a description of some fossil remains brought by H. R. H. Prince Alfred from South Africa, November 1860' by Richard Owen | 20 March 1862 |
| RR/4/192 | Referee's report by Philip de Malpas Grey Egerton, on a paper 'On the vertebral characters of the order pterosauria, as exemplified in the genera pterodactylus (cuvier) and dimorphodon (Owen)' by Richard Owen | 6 July 1859 |
| MC/6 | Volume 6 of miscellaneous correspondence regarding business matters, sent to the Royal Society | 1859-1863 |
| MC/12 | Volume 12 of miscellaneous correspondence regarding business matters, sent to the Royal Society | 1880-1883 |
| RR/7/92 | Referee's report by Phillip de Malpas Egerton, on a paper 'On the structure and affinities of guynia annulata, dunc., with remarks upon the persistence of palaeozoic types of madreporaria' by Peter Martin Duncan | 29 July 1871 |
| RR/7/123 | Referee's report by Philip de Malpas Grey Egerton, on a paper 'On the fossil mammals of Australia.—Part IV. Dentition and mandible of thylacoleo carnifex, with remarks on the arguments for its herbivority' by Richard Owen | 30 January 1871 |
| RR/7/126 | Letter from Philip de Malpas Grey Egerton, on a paper 'On the fossil mammals of Australia.—Part IV. Dentition and mandible of thylacoleo carnifex, with remarks on the arguments for its herbivority' by Richard Owen | 27 March 1871 |
| RR/4/190 | Referee's report by Philip de Malpas Grey Egerton, on a paper 'On the fossil mammals of Australia - Part I - Description of a mutilated skull of a large marsupial carnivore (Thylacoleo carnifex, Owen), from a calcareous conglomerate stratum, eighty miles S. W. of Melbourne, Victoria' by Richard Owen | 9 February 1859 |