| RefNo | Title | Date |
| MS/709/40 | Letter from Thomas John Newbold, Alexandria, to James De Carle Sowerby, Geological Society Rooms, Somerset House, London | 30 November 1840 |
| MS/709/41 | Letter from Thomas John Newbold, to [James De Carle Sowerby?] | c1845 |
| EC/1842/01 | Newbold, Thomas John: certificate of election to the Royal Society | |
| RR/1/170 | Referee's report by unnamed referee, on a paper 'Present state of the diamond mines of Golconda' by Thomas John Newbold | [1837] |
| RR/1/171 | Referee's report by Charles Giles Bridle Daubeny, on a paper 'On the temperature of the springs, wells and rivers of India and Egypt, and of the sea and table-lands within the tropics' by Thomas John Newbold | 24 June 1844 |
| AP/21/7 | Unpublished paper, 'On the ipoh or upas poison used by the Jacoons and other aboriginal tribes of the Malay Peninsula' by T J [Thomas John] Newbold | 1837 |
| AP/21/18 | Unpublished letter, 'On the régar [regur] or the black cotton-soil of India' from T J [Thomas John] Newbold to the Secretary of the Royal Society | 12 August 1837 |
| AP/23/36 | Unpublished paper, 'Present State of the Diamond mines of Golconda [India]' by T J [Thomas John] Newbold | 1840 |
| AP/23/36/2 | Unpublished diagram, section of land between a diamond mine and river by T J [Thomas John] Newbold | 1840 |
| AP/23/36/1 | Unpublished manuscript, 'Present State of the Diamond mines of Golconda [India]' by T J [Thomas John] Newbold | 1840 |
| PT/29/1 | Paper, 'On the temperature of the springs, wells and rivers of India and Egypt, and of the sea and table-lands within the tropics, with a few remarks on Mr Boussingault's mode of ascertaining the mean temperature of equinoctial regions' by Capt [Thomas John] Newbold | [1842] |
| PT/29/1i | Letter, regarding submission of paper on the temperature of wells and thermal springs from Thomas John Newbold to S H [Samuel Hunter] Christie | 15 July 1842 |
| HS/13/122 | Letter, from Thomas John Newbold to Sir John Herschel, dated at Kurnoal | 11 December 1843 |
| HS/13/121 | Letter, from Thomas John Newbold to Sir John Herschel, dated at Bombay | 15 July 1842 |