| Reference number | Title | Date |
| IM/002254 | Horne, John and Peach, Benjamin Neeve | nd |
| NLB/69/241 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to [John] Horne, FRS | 12 February 1926 |
| NLB/11/860 | Copy letter from Herbert Rix, to Sir Archibald Geikie, Fellow of the Royal Society | 21 October 1895 |
| NLB/71/159 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Dr. [John] Horne, FRS | 25 January 1928 |
| NLB/21/218 | Copy letter from Robert William Frederick Harrison, to John Horne, Fellow of the Royal Society, 12 Keith Crescent, Blackhall, Midlothian | 1 October 1900 |
| NLB/21/325 | Copy letter from Robert William Frederick Harrison, to John Horne, Fellow of the Royal Society, Geological Survey | 31 October 1900 |
| NLB/67/640 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Dr John Horne, FRS | 5 February 1925 |
| NLB/27/467 | Copy letter from Robert William Frederick Harrison, to John Horne, Fellow of the Royal Society | 2 October 1903 |
| NLB/41/629 | Copy letter from John Rose Bradford, to Dr John Horne, Fellow of the Royal Society | 24 January 1910 |
| NLB/42/750 | Copy letter from Robert William Frederick Harrison to Dr J [John] Horne FRS | 1 October 1910 |
| NLB/43/397 | Copy letter from Robert William Frederick Harrison, to Dr John Horne, Fellow of the Royal Society | 26 December 1910 |
| NLB/45/227 | Copy letter from Robert William Frederick Harrison to Dr J [John] Horne FRS | 19 January 1912 |
| NLB/47/218 | Copy letter from Robert William Frederick Harrison to Dr John Horne FRS | 19 December 1912 |
| NLB/51/202 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society to Dr John Horne FRS | 9 January 1915 |
| NLB/51/453 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society to Dr John Horne FRS | 23 March 1915 |
| NLB/51/822 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society to Dr J Horne FRS | 6 June 1915 |
| NLB/52/556 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Dr. John Horne, FRS | 13 January 1916 |
| NLB/54/895 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Dr. John Horne, FRS | 31 October 1917 |
| NLB/54/893 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Dr. [John] Horne, FRS | 30 October 1917 |
| NLB/62/365 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Dr. John Horne, FRS | 31 January 1922 |
| NLB/57/304 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Dr John Horne, FRS | 11 October 1919 |
| NLB/69/95 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Dr. [John] Horne, FRS | 8 January 1926 |
| NLB/58/163 | Copy letter from Edwin Deller, Assistant Secretary of the Royal Society; to Dr. John Horne, FRS | 22 March 1920 |
| NLB/58/760 | Copy letter from Edwin Deller, Assistant Secretary of the Royal Society; to Dr. John Horne, FRS | 16 June 1920 |
| NLB/59/717 | Copy letter from Edwin Deller, Assistant Secretary of the Royal Society; to Dr. John Horne, FRS | 5 November 1920 |
| NLB/67/330 | Copy letter from William Bate Hardy, Secretary of the Royal Society; to Dr John Horne, FRS | 5 December 1924 |
| NLB/61/724 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Dr. [John] Horne, FRS | 18 October 1921 |
| NLB/67/797 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Sir John [Rose] Bradford, KCMG, FRS | 12 March 1925 |
| NLB/66/8 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; Dr [John] Horne, FRS | 4 February 1924 |
| NLB/67/623 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Dr John Horne, FRS | 2 February 1925 |
| NLB/67/469 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Dr [John] Horne, FRS | 5 January 1925 |
| NLB/67/400 | Copy letter from William Bate Hardy, Secretary of the Royal Society; to Dr John Horne, FRS | 15 December 1924 |
| NLB/67/805 | Copy letter from William Bate Hardy, Secretary of the Royal Society; to Dr [John] Horne, FRS | 12 March 1925 |
| NLB/69/115 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Dr. [John] Horne, FRS | 14 January 1926 |
| NLB/70/239 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Dr [John] Horne, FRS | 14 February 1927 |
| NLB/69/98 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Dr. [John] Horne, FRS | 11 January 1926 |
| NLB/67/843 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Dr [John] Horne, FRS | 23 March 1925 |
| NLB/69/254 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Dr. [John] Horne, FRS | 15 February 1926 |
| NLB/69/225 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Dr. John Horne, FRS | 8 February 1926 |
| NLB/68/582 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Dr [John] Horne, FRS | 5 September 1925 |
| NLB/71/60 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Dr [John] Horne, FRS | 16 December 1927 |
| IM/002253 | Horne, John | nd |
| EC/1900/06 | Horne, John: certificate of election to the Royal Society | |
| NLB/57 | New Letter Book volume 57, copy letters sent from Royal Society administration | 27 June 1919-27 February 1920 |