| Reference number | Title | Date |
| L&P/1/323 | Paper, 'Of some seeds' by James Parsons | 1744 |
| AB/1/2/1/15 | Account of Money laid out for the use of the Royal Society by James Parsons MD | 20 March 1757 - 23 November 1758 |
| L&P/3/62 | Letter, 'Of the earthquake of Nov 1, at Lisbon' from Richard Wolfall to James Parsons | 22 November 1755 |
| L&P/1/406 | Paper, 'Of a quadruped brought from Bengal' by James Parsons | 27 June 1745 |
| L&P/1/163 | Paper, 'Some account of the phoca of sea-calf (vitulus marinus)' by James Parsons | 1742 |
| L&P/1/468 | Letter, 'Further account of the opossum by Dr M. of Urbana, VA., in answer to queries by Dr E. Milward & Dr J. Parsons FRS' from John Mitchell to the Royal Society | 8 July 1745 |
| MM/3/13 | Certificates from James Parsons and Henry Baker to the Royal Society | 18-19 December 1767 |
| L&P/1/219 | Letter, 'An account of the sixth volume of Reaumur's History of Insects' from James Parsons to Martin Folkes | 1743 |
| L&P/3/242 | Letter, 'Of a sheep disease' from James Parsons to Thomas Birch | 25 April 1757 |
| L&P/2/60 | Letter, 'Of the earthquake of March 8' from James Parsons to Martin Folkes | 15 March 1750 |
| L&P/1/163/1 | Paper, 'Some account of the phoca of sea-calf (vitulus marinus)' by James Parsons | 1742 |
| L&P/4/239 | Letter, 'An account of the 'Memoire sur le Pholade' by Delafaille' from James Parsons to Thomas Birch | 3 November 1764 |
| L&P/3/1 | Letter, 'Of the use of Ribwort (plantain) for the cure of the bite of a mad dog' from Charles Smith to James Parsons | 18 March 1755 |
| L&P/2/190 | Letter, 'Of a very small monkey' from James Parsons to the Royal Society | 1751 |
| L&P/2/515 | Paper, 'On Kircher's opinion as to the burning of Marcellus' fleet by Archimedes' by James Parsons | 1754 |
| L&P/3/129 | Letter, 'Concerning electrical vapour' from A Bertrand to James Parsons | 19 February 1756 |
| L&P/4/349 | Paper, 'Of the East Indian elks' by James Parsons and Peter Collinson | 26 February 1766 |
| L&P/1/198/1 | Letter, 'Of the natural history of the rhinoceros' from James Parsons to Martin Folkes | 1743 |
| L&P/1/414/1 | Paper, 'Abstract of the history of a stag beetle' by James Parsons | 1745 |
| L&P/1/407 | Paper, 'Of some small crystal stones' by James Parsons | 1745 |
| L&P/2/184 | Letter, 'Of a pretended hermaphrodite shown in London' from James Parsons to the Royal Society | 1750 |
| L&P/1/167 | Letter, 'Of petrifactions' from John Tuberville Needham to James Parsons | 1742 |
| L&P/2/289 | Letter, 'Of the shells of crabs' from James Parsons to Peter Collinson | 22 April 1752 |
| L&P/1/193 | Letter, 'Concerning certain small and white worms found in dissecting trout' from John Tuberville Needham to James Parsons | 27 May 1743 |
| L&P/2/101 | Paper, 'Of the phocae' by James Parsons | 1751 |
| L&P/1/414 | Paper, 'Abstract of the history of a stag beetle' by James Parsons | 1745 |
| L&P/3/293 | Letter, 'Acknowledging his election as FRS, mentioning a gold filament 5 ft long, 30 'baths' in the county of Zolia, Hemlock, Pertified wood' from Justus Johannes Torkos to James Parsons | 4 July 1757 |
| L&P/3/282 | Letter, 'The anatomical table of C N J, described by Dr James Parsons' from Charles Nicholas Jenty to Thomas Birch | 20 October 1757 |
| L&P/3/325 | Paper, 'An account of the Rev Mr Pullein's essay on the culture of silk' by James Parsons | 30 May 1758 |
| L&P/2/401 | Letter, 'Of hollow bougies' from William Broomfield to James Parsons | 19 January 1752 |
| L&P/3/186 | Paper, 'Of Mazeas's letter about Caylus's method of wax painting' by James Parsons | 1756 |
| L&P/3/67 | Letter, 'Of the earthquake of Nov 1 at Lisbon' from Richard Wolfall to James Parsons | 18 November 1755 |
| L&P/2/490 | Paper, 'An account of Charles Bonnet's treatise of the use of leaves and plants' by James Parsons | 1754 |
| L&P/3/357 | Paper, 'Of a scrotal hernia, with a note by James Parsons' by William Barrett | 9 November 1758 |
| L&P/4/6 | Letter, 'A spiral thermometer' from John Tuberville Needham to James Parsons | 12 October 1759 |
| L&P/3/401 | Letter, 'Of a physiological dissertation sent to the Royal Society' from Jean Bernard to James Parsons | 27 October 1759 |
| L&P/4/98 | Letter, 'Translation of a letter when forwarding two theses on the institutes of chemistry' from Jean Bernard to James Parsons | 1762 |
| L&P/4/304 | Letter, 'On the double horns of the rhinoceros' from James Parsons to James Douglas | 1766 |
| L&P/4/40 | Paper, 'Official report on a large collection of stones from Siberia sent by Count S' by James Parsons | 1761 |
| L&P/4/366 | Letter, 'Of a new invented instrument for fractured legs' from William Sharpe to James Parsons | 10 November 1766 |
| L&P/1/160 | Illustration, 'A phoca from Fossdyke Wash, Lincolnshire shown alive at the Golden Cross, Charing Cross' by James Parsons | 10 February 1742 |
| L&P/5/41 | Paper, 'Of a chameleon' by James Parsons | 1768 |
| L&P/2/316 | Letter, 'On corals' from James Parsons to Thomas Birch | 17 June 1752 |
| L&P/1/172 | Letter, 'On the sex of the same child' from James Parsons to John Machin | 27 February 1742 |
| MM/3/10 | Letter from James Parsons, London, to George Parker, 2nd Earl of Macclesfield, President, Royal Society | 28 December 1761 |
| L&P/1/452 | Paper, 'Of the happy effect of musk in rheumatic fever' by James Parsons | 1746 |
| L&P/1/144 | Paper, 'A short account of Monsieur Le Cat's book entitles Traite des Sens [Treat the Senses]' by James Parsons | 1742 |
| L&P/2/516 | Letter, 'Of fossil elephant bones found in Sheppy' from Jacob to James Parsons | 20 November 1753 |
| L&P/3/17 | Letter, 'Note on a sheep's skin' from James Parsons to Thomas Birch | 29 April 1755 |
| L&P/1/198 | Paper, 'Of the natural history of the rhinoceros' by James Parsons | 1743 |
| L&P/3/14 | Letter, 'Of a petrified Echinus' from James Parsons to the Royal Society | 9 January 1755 |
| EC/1741/04 | Parsons, James: certificate of election to the Royal Society | 7 May 1741 |
| L&P/2/295 | Letter, 'Of inoculation for small-pox 'till some easier safer & equally certain method be discovered' from Richard Brooke to James Parsons | 10 May 1742 |