| Reference number | Title | Date |
| AB/1/2/1/22 | Receipt for £1 13s and 6d received of Mr Hauksbee by Thomas Birch for postage and porterage | 6 November 1760 |
| AB/1/2/1/13 | Receipt to Thomas Birch for money received from Mr Hauksbee | 9 November 1758 |
| L&P/2/539 | Letter, 'Agaric as a syptic' from Joseph Warner to Thomas Birch | 3 December 1754 |
| L&P/4/14 | Letter, 'Of a supposed accidental cross between a pheasant and a turkey' from George Edwards to Thomas Birch | 22 May 1760 |
| L&P/4/5 | Letter, 'Of the frog-fish of Surinam' from Henry Baker to Thomas Birch | 17 April 1760 |
| L&P/4/193 | Letter, 'Of an extraordinary tide at Bristol' from Josiah Tucker to Thomas Birch | 1764 |
| MM/1/51 | Letter from John Swinton, Christ Church, Oxford, to Thomas Birch | 23 September 1760 |
| MM/10/131 | Letter from Charles Mason and Jeremiah Dixon, Plymouth, to Dr Thomas Birch | 27 January 1761 |
| P/0008 | Portrait of Birch, Thomas | |
| NLB/5/695 | Copy letter from Herbert Rix, to R B Prosser, 75 Dartmouth Park Road, Highgate, N.W. | 18 September 1891 |
| L&P/3/242 | Letter, 'Of a sheep disease' from James Parsons to Thomas Birch | 25 April 1757 |
| MM/10/125 | Letter from Jeremiah Dixon, Portsmouth, to Dr Thomas Birch, Secretary, Royal Society | 19 December 1760 |
| L&P/3/219 | Letter, 'Of certain shocks and earthquakes' from Abraham Trembley to Thomas Birch | 1 February 1757 |
| L&P/3/30 | Letter, 'A statement concerning Sir I. Newton's Chronology of ancient kingdoms' from G Costard to Thomas Birch | 10 October 1754 |
| 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/3/353 | Letter, 'Of staining or painting marble' from Robert Chalmers to Thomas Birch | 7 February 1759 |
| L&P/2/321 | Letter, 'Remarks on Daviel's method of couching for cataract' from John Clephane to Thomas Birch | 1752 |
| L&P/3/406 | Letter, 'Of the recent comet' from John Michel to Thomas Birch | 10 January 1760 |
| L&P/3/294 | Letter, 'Notes on classics, embalming, wheat' from Peter Templeman to Thomas Birch | 28 December 1757 |
| L&P/2/484 | Letter, 'Inscriptions in the book Ruins of Palmyra', as examined by Barthelmy' from Joseph de Guignes to Thomas Birch | 23 February 1754 |
| L&P/3/221 | Letter, 'Of antiquities discovered at Herculaneum' from John Nixon to Thomas Birch | 1757 |
| L&P/2/260 | Letter, 'Oh a hybrid canary' from George Edwards to Thomas Birch | 3 February 1752 |
| L&P/2/564 | Letter, 'Of the ascent of vapours' from Henry Eeles to Thomas Birch | 25 September 1754 |
| L&P/4/165 | Letter, 'On a fire escape' from Samuel Dunn to Thomas Birch | 1763 |
| L&P/4/32 | Letter, 'Of the use of furze in fencing' from David Wark to Thomas Birch | 13 December 1760 |
| L&P/2/432 | Letter, 'Of a coralline' from John Ellis to Thomas Birch | 15 March 1753 |
| L&P/4/124 | Letter, 'The case of mortification described previously' from Charlton Wollaston to Thomas Birch | 29 October 1762 |
| L&P/3/13 | Letter, 'Of experiments made to prove the electrification of ascending vapours' from Henry Eeles to Thomas Birch | 31 March 1755 |
| L&P/2/465 | Paper, 'Remarks on W. Watson's account of Nollet's letters concerning electricity' by Thomas Birch | 1753 |
| L&P/2/285 | Letter, 'Of a shock of earthquake' from Charles Lyttleton to Thomas Birch | 13 April 1752 |
| L&P/2/498 | Letter, 'Of a reference to electricity in Hirtious history of Caesar's African war' from William Stukeley to Thomas Birch | 21 March 1754 |
| L&P/2/537 | Letter, 'A remedy for the late contagious disease among horned cattle' from G Williams to Thomas Birch | 18 November 1754 |
| L&P/2/385 | Letter, 'Of Chinese astronomy and geography' from Antoine Gaubil to Thomas Birch | 2 November 1752 |
| L&P/3/245/1 | Letter, 'Of the grey coot-footed Tringa, a species of snipe' from George Edwards to Thomas Birch | 3 May 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/2/297 | Letter, 'Of a monstrous sheep with a horn near a yard long' from John Bevis to Thomas Birch | 14 May 1752 |
| L&P/4/206 | Letter, 'Observations of an eclipse of the sun' from Mark Day to Thomas Birch | 3 April 1764 |
| L&P/2/340 | Letter, 'Of a case treated with agaric and of Daviel's couching for cataract' from Joseph Warner to Thomas Birch | 21 December 1752 |
| L&P/2/417 | Letter, 'Of a double burr about the moon' from Henry Miles to Thomas Birch | 22 February 1753 |
| L&P/2/427 | Letter, 'Of birds taken at sea' from George Edwards to Thomas Birch | 8 March 1753 |
| L&P/2/505 | Letter, 'Progress of geography' from Robert de Vaugondy to Thomas Birch | 1754 |
| L&P/4/1 | Letter, 'The comet or aurora of March 10 1760' from Mark Day to Thomas Birch | 11 March 1760 |
| L&P/4/187 | Letter, 'Sheaves of rays from the Sun among clouds' from Samuel Dunn to Thomas Birch | 13 January 1764 |
| L&P/2/377 | Letter, 'Of a fossil found at Dudley, Staffs' from Emanuel Mendes da Costa to Thomas Birch | 12 July 1753 |
| L&P/3/104 | Letter, 'Of a case of vomiting and its cause' from Charles Nicholas Jenty to Thomas Birch | 2 February 1756 |
| L&P/2/374 | Letter, 'The rainfall at Charlestown S.C. for 15 years last past' from John Lining to Thomas Birch | 9 April 1753 |
| L&P/4/168 | Letter, 'Of purifying air in hospitals' from Thomas White to Thomas Birch | 22 June 1763 |
| L&P/4/308 | Letter, 'Of a new barometer' from Henry Pyefinch to Thomas Birch | 1766 |
| L&P/4/240/1 | Letter, 'Of an ear of corn drawn out the bladder of a man' from Terence Brady to Thomas Birch | 16 August 1763 |
| L&P/2/496 | Paper, 'A remark relating to the decyphering of the Palmyrean characters' by Thomas Birch | 1754 |
| L&P/2/349 | Letter, 'Sends a single granule of gold from Cornish tin-works' from C Lyttleton to Thomas Birch | 21 May 1753 |
| L&P/4/8 | Letter, 'Of a bone found in the pelvis of a man at Brussels' from Terence Brady to Thomas Birch | 29 March 1760 |
| L&P/4/123 | Letter, 'On the occasion of sending books to the Society' from Amquetil Duperon to Thomas Birch | 24 September 1762 |
| L&P/3/164 | Letter, 'Of the gravity of the air' from Silvester O'Halloran to Thomas Birch | 4 April 1756 |
| L&P/3/133 | Letter, 'Earthquake at Brussels' from John Pringle to Thomas Birch | 11 March 1756 |
| L&P/3/423 | Letter, 'Of certain controversies between himself and Frere Come' from Claude Nicholas Le Cat to Thomas Birch | 6 April 1757 |
| NLB/68/605 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to H. C. Steel Esq.; 23a Browning Road, Enfield | 22 September 1925 |
| L&P/4/125 | Letter, 'Accompanying 31 coloured plates for a third part of his Gleanings of Natural History' from George Edwards to Thomas Birch | 9 October 1762 |
| L&P/4/195 | Letter, 'Observations of Jupiter's satellites' from Samuel Dunn to Thomas Birch | 8 March 1764 |
| L&P/3/25 | Letter, 'Of a human spleen weighin 37 ounces' from Charles Nicholas Jenty to Thomas Birch | 1755 |
| L&P/4/114 | Letter, 'Of finding longitude at sea by observation of the Moon' from Nevil Maskelyne to Thomas Birch | 14 May 1762 |
| L&P/4/17 | Letter, 'Of a late discovery of asbestos' from John Tuberville Needham to Thomas Birch | 17 May 1760 |
| L&P/3/152 | Letter, 'Of the machine to measure the way of a ship at sea' from John Smeaton to Thomas Birch | 21 March 1756 |
| L&P/4/90 | Letter, 'A surgical case - a knife broken off in the body' from Thomas Baker to Thomas Birch | 1761 |
| L&P/3/168 | Letter, 'An account of Dr Wark's paper on improving refracting telescopes, which had been referred him' from James Short to Thomas Birch | 20 May 1756 |
| L&P/4/252 | Letter, 'On lenses' from G Maria della Torre to Thomas Birch | 29 January 1765 |
| L&P/3/251 | Letter, 'On an evening solar Iris' from George Edwards to Thomas Birch | 6 June 1757 |
| L&P/4/194 | Letter, 'Of gordii - horse-hair worms - with literary news' from Emanuel Mendez da Costa to Thomas Birch | 24 February 1764 |
| L&P/4/279 | Letter, 'Of an improved barometer' from James Ferguson to Thomas Birch | 8 November 1765 |
| L&P/3/38 | Letter, 'Of insects of the polype kind found in waters near Brussels' from T Brady to Thomas Birch | 20 September 1755 |
| L&P/2/310 | Letter, 'On the lava of Mount Vesuvius' from Emanuel Mendes da Costa to Thomas Birch | 4 June 1752 |
| L&P/3/37 | Letter, 'Of worms in animal bodies' from Frank Nicholls to Thomas Birch | 6 November 1755 |
| L&P/2/316 | Letter, 'On corals' from James Parsons to Thomas Birch | 17 June 1752 |
| IM/000380 | Birch, Thomas | nd |
| DM/5/100 | A list of benefactors to the Library, to the value of £5 or upwards at one time | c.1737 |
| L&P/2/409 | Letter, 'On the alteration of the island of Scilly' from William Borlase to Thomas Birch | 21 December 1752 |
| L&P/4/100 | Letter, 'Of an agitation of the sea at Barbadoes' from Abraham Mason to Thomas Birch | 30 May 1761 |
| L&P/4/302 | Letter, 'Of an inedited Greek coin [colony]' from John Swinton to Thomas Birch | 7 December 1765 |
| EC/1734/25 | Birch, Thomas: certificate of election to the Royal Society | 20 February 1735 |
| NLB/61/407 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to S. B. Gaythorpe Esquire; 3 Prospect Road, Barrow-in-Furness | 2 July 1921 |
| L&P/3/321 | Paper, 'Account of the Black Assize at Oxford, 1577' by the Merton College Register, University of Oxford and additional remarks by Thomas Birch | 1577-1757 |
| L&P/3/276 | Letter, 'The number of people in England' from Richard Forster to Thomas Birch | 9 November 1757 |
| L&P/2/369 | Letter, 'Of the Giant's Causeway' from Richard Pocoke to Thomas Birch | 18 June 1753 |
| L&P/2/51a | Letter, 'Of the earthquake in London of March 8 1749/50' from Thomas Birch to the Royal Society | 1750 |
| L&P/2/524 | Letter, 'Of two electrical experiments' from Johann Heinrich Winkler to Thomas Birch | 22 May 1754 |
| L&P/3/404 | Letter, 'Of the meteor of 20 Nov' from William Dutton to Thomas Birch | 1 December 1759 |
| L&P/3/17 | Letter, 'Note on a sheep's skin' from James Parsons to Thomas Birch | 29 April 1755 |
| L&P/2/386 | Letter, 'Meteorological observations at Dublin' from James Simon to Thomas Birch | 15 November 1753 |
| L&P/3/298 | Letter, 'Dissertation on the antiquity of glass in windows' from John Nixon to Thomas Birch | 1758 |
| L&P/4/162 | Letter, 'An observation in optics (vision in fish)' from George Edwards to Thomas Birch | 15 June 1763 |
| L&P/3/36 | Letter, 'Sensibility and irritability in animals' from Richard Brocklesby to Thomas Birch | 1755 |
| L&P/3/227 | Letter, 'The thermometer reading at the Hague on 9 Jan 1757' from Abraham Trembley to Thomas Birch | 15 February 1757 |
| L&P/3/150 | Letter, 'Covering letter referring to the following item; and account of a Parthian coin' from Robert Clogher and John Swinton to Thomas Birch | 25 March 1756 |
| L&P/3/201 | Letter, 'Of the earthquake of 18 Nov 1755 in New England' from John Winthrop to Thomas Birch | 10 January 1756 |
| L&P/4/300 | Letter, 'Of some new electrical experiments' from Giovanni Battista Beccaria to Thomas Birch | 1766 |
| L&P/4/160 | Letter, 'Of a curious fish' from James Ferguson to Thomas Birch | 5 May 1763 |
| L&P/4/277 | Letter, 'Of green hemlock only a palliative in a case of cancer' from Josiah Colebrooke to Thomas Birch | 31 October 1765 |
| L&P/2/526 | Letter, 'On Melvill's optical paper in the Philosophical Transactions' from Alexis Claude Clairaut to Thomas Birch | 30 June 1754 |
| L&P/3/60 | Paper, 'Agitation in Peerless Pool on Nov 1 1755' by Thomas Birch | 1755 |
| MM/10/133 | Letter from P Stephens, Admiralty Office, to Dr Thomas Birch | 31 January 1761 |
| L&P/3/78 | Letter, 'The Thames at Rotherhithe on Nov 1' from Henry Mills to Thomas Birch | 15 December 1755 |
| L&P/3/90 | Letter, 'Of the earthquake of Nov 1, at Neufchatel' from Rodolph Valtravers to Thomas Birch | 1755 |
| L&P/3/44 | Letter, 'Movement of waters at Busbridge near Godalming on Nov 1, 1755' from Philip Carteret Webb to Thomas Birch | 10 November 1755 |
| L&P/3/52 | Letter, 'Agitation of waters at Portsmouth on Nov 1' from John Robertson to Thomas Birch | 23 November 1755 |
| L&P/3/297 | Letter, 'An experiment to show that the salt of steel does not enter the lacteal vessels' from Edward Wright to Thomas Birch | 28 February 1758 |
| L&P/3/394 | Letter, 'Of a fireball seen 20 October 1759' from Richard Forster to Thomas Birch | 31 October 1759 |
| L&P/4/37 | Letter, 'Of a meteor; and of a whirlwind' from John Winthrop to Thomas Birch | 30 July 1759 |
| L&P/4/170 | Letter, 'Of an earthquake in the East Indies and two eclipses observed at Calcutta' from William Hirst to Thomas Birch | 3 November 1762 |
| MC/25/38 | Letter from Edward Brabrook, Society of Antiquaries of London, Burlington House, Piccadilly, W, to The Secretary, [Royal Society] | 4 January 1910 |
| L&P/2/306 | Letter, 'Chart form'd upon the new discoveries in America made by Admiral Fuentes' from Joseph de Guignes to Thomas Birch | 1 June 1752 |
| NLB/60/877 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to S. B. Gaythorpe Esquire; 3 Prospect Road, Barrow-in-Furness | 20 April 1921 |