| RefNo | Title | Date |
| EC/1901/05 | Gregory, John Walter: certificate of election to the Royal Society | |
| IM/001779 | Gregory, John Walter | nd |
| NLB/19/785 | Copy letter from an unknown correspondent, to William Johnson Sollas, Fellow of the Royal Society | [17 December 1899] |
| NLB/19/787 | Copy letter from Robert William Frederick Harrison, to Dr John Walter Gregory, British Museum, Natural History | 19 December 1899 |
| NLB/20/168 | Copy letter from Arthur William Rucker, to Professor John Walter Gregory, [Fellow of the Royal Society], The University, Melbourne, Victoria | 16 February 1900 |
| NLB/19/797 | Copy letter from Robert William Frederick Harrison, to Dr John Walter Gregory, [Fellow of the Royal Society], British Museum, Natural History, Cromwell Road, S.W. | 21 December 1899 |
| NLB/19/796 | Copy letter from Robert William Frederick Harrison, to Professor Edwin Ray Lankester, Chairman of the Zoology Sectional Committee | 21 December 1899 |
| NLB/19/670 | Copy letter from Robert William Frederick Harrison, to Professor Edwin Ray Lankester, Fellow of the Royal Society | 21 November 1899 |
| NLB/19/832 | Copy letter from Robert William Frederick Harrison, to Professor William Abbott Herdman, Fellow of the Royal Society | 4 January 1900 |
| NLB/25/33 | Copy letter from Theodore E James, to Professor John Walter Gregory, Fellow of the Royal Society | [29 July 1902] |
| NLB/30/475 | Copy letter from Robert William Frederick Harrison, to Professor John Walter Gregory, Fellow of the Royal Society | 30 March 1905 |
| NLB/39/307 | Copy letter from Robert William Frederick Harrison to Professor J [John] W [Walter] Gregory, Fellow of the Royal Society | 16 December 1908 |
| NLB/46/635 | Copy letter from Henry George Lyons, to Dr Charles William Andrews, Alfred Harker, Dr George Jennings Hinde, Clement Reid, Professor Albert Charles Seward, Professor William Whitehead Watts, Captain Thomas Henry Tizard, Professor John Walter Gregory | 7 October 1912 |
| RR/20/135 | Referee's report by John Walter Gregory, on a paper 'The evolution of the cretaceous asteroidea' by William Kingdon Spencer | 21 March 1913 |
| NLB/65/738 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Professor [John Walter] Gregory, FRS | 14 December 1923 |
| NLB/57/714 | Copy letter from Sir James Hopwood Jeans, FRS, Secretary of the Royal Society; to Professor JW [John Walter] Gregory, FRS | 27 January 1920 |
| NLB/54/411 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Professor [John Walter] Gregory, FRS | 4 May 1917 |
| NLB/68/235 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Professor [John Walter] Gregory, FRS | 4 June 1925 |
| NLB/72/395 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Dr [Francis Arthur] Bather, FRS | 30 September 1929 |
| NLB/58/265 | Copy letter from Edwin Deller, Assistant Secretary of the Royal Society; to Professor [William Whitehead] Watts, Chairman of the Geology Committee and FRS | 13 April 1920 |
| NLB/58/890 | Copy letter from Edwin Deller, Assistant Secretary of the Royal Society; to Professor [John Walter] Gregory, FRS | 30 June 1920 |
| NLB/59/528 | Copy letter from James Hopwood Jeans, Secretary of the Royal Society; to Professor [John Walter] Gregory, FRS | 13 October 1920 |
| NLB/59/289 | Copy letter from Edwin Deller, Assistant Secretary of the Royal Society; to Professor [John Walter] Gregory, FRS | 28 August 1920 |
| RR/14/164 | Referee's report by William Johnson Sollas, on a paper 'Polytremacis and the ancestry of Helioporidae' by John Walter Gregory | nd [December 1899] |
| RR/14/165 | Referee's report by Alfred Cort Haddon, on a paper 'Polytremacis and the ancestry of Helioporidae' by John Walter Gregory | nd [January 1900] |
| RR/14/163 | Referee's report by Sydney John Hickson, on a paper 'Polytremacis and the ancestry of Helioporidae' by John Walter Gregory | nd [December 1899] |
| NLB/57/520 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Professor J W [John Walter] Gregory, FRS | 24 November 1919 |
| NLB/57/443 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Professor JW [John Walter] Gregory, FRS | 10 November 1919 |
| NLB/57/825 | Copy letter from Sir William Bate Hardy, FRS, Secretary of the Royal Society;to Professor WW [William Whitehead] Watts, FRS | 14 February 1920 |
| NLB/64/775 | Copy letter from [William Bate Hardy], Secretary of the Royal Society; to Professor [John Walter] Gregory, FRS | 15 June 1923 |
| NLB/64/893 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Professor. [John Walter] Gregory, FRS | 7 July 1923 |
| NLB/65/534 | Copy letter from William Bate Hardy, Secretary of the Royal Society; to Sir Aubrey Strahan, FRS | 14 November 1923 |
| NLB/66/60 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Prof. [John Walter] Gregory, FRS | 15 February 1924 |
| NLB/66/31 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Prof. [John Walter] Gregory, FRS | 12 February 1924 |
| NLB/66/330 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Prof. [John Walter] Gregory, FRS | 10 April 1924 |
| NLB/57/897 | Copy letter from Edwin Deller, Acting Assistant Secretary of the Royal Society; to Professor WW [William Whitehead] Watts, FRS | 28 February 1920 |
| NLB/66/363 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; [George William] Lamplugh Esq, FRS | 16 April 1924 |
| NLB/72/377 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Professor [John Walter] Gregory, FRS | 12 September 1929 |
| NLB/73/151 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Prof. [John Walter] Gregory, FRS | 8 January 1931 |
| CD/68/6 | Letter from [John Walter] Gregory, to Robert Harrison, Assistant Secretary of the Royal Society | 8 May 1917 |
| RR/19/128 | Referee's report by John Walter Gregory, on a paper 'On Onychester, a Carboniferous brittle-star' by Igerna Brünhilda Johnson Sollas | [December 1912] |
| RR/30/59 | Referee's report by Richard Dixon Oldham, on a paper 'The geology and physical geography of Chinese Tibet, and its relations to the mountain system of south-eastern Asia, from observations made during the Percy Sladen expedition, 1922' by John Walter Gregory and C J Gregory | 4 February 1924 |
| MS/547/5/12 | Letter from J W [John Walter] Gregory, Bassetts, Little Baddow, Chelmsford,to A B [Alfred Bray] Kempe | 11 February 1901 |
| NLB/59 | New Letter Book volume 59, copy letters sent from Royal Society administration | 9 July 1920-2 December 1920 |
| NLB/57 | New Letter Book volume 57, copy letters sent from Royal Society administration | 27 June 1919-27 February 1920 |
| RR/30/60 | Referee's report by Gerald Ponsonby Lenox-Conyngham, on a paper 'The geology and physical geography of Chinese Tibet, and its relations to the mountain system of south-eastern Asia, from observations made during the Percy Sladen expedition, 1922' by John Walter Gregory and C J Gregory | [February 1924] |
| RR/41/39 | Referee's report by John Walter Gregory, on a paper 'The geographical representation of the Mountains of Tibet' by Sidney Gerald Burrard | 12 April 1930 |
| NLB/37/295 | Copy letter from Archibald Geikie to Professor [John Walter] Gregory | 27 February 1908 |
| MS/547/5/8 | Letter from J W [John Walter] Gregory, Bassetts, Little Baddow, Chelmsford, to unknown recipient [?Alfred Bray Kempe] | 6 February 1901 |