| RefNo | Title | Date |
| MS/525/7/3/1 | Letter from Richard Dixon Oldham, 8 North Street, Horsham, Sussex, to Dugald Clerk | 27 June 1915 |
| IM/003370 | Oldham, Richard Dixon | nd |
| RR/24/71 | Referee's report by Herbert Hall Turner, on a paper 'The support and origin of the mountains of central Asia' by Richard Dixon Oldham | [April 1917] |
| RR/16/351 | Referee's report by Horace Lamb, on a paper 'The rate of transmission of the Guatemala earthquake of April 19, 1903' by Richard Dixon Oldham | 17 February 1905 |
| RR/16/218 | Referee's report by Horace Lamb, on a paper 'The seismic effect of tidal stresses' by by Richard Dixon Oldham | May 1904 |
| RR/16/219 | Second referee's report by Horace Lamb, on a paper 'The seismic effect of tidal stresses' by Richard Dixon Oldham | 3 June 1904 |
| RR/24/72 | Letter from Henry George Lyons, to Aubrey Strahan, regarding a paper 'The support and origin of the mountains of central Asia' by Richard Dixon Oldham | 2 June 1917 |
| NLB/19/115 | Copy letter from Arthur William Rucker, to Professor George Carey Foster, [Fellow of the Royal Society] | 26 June 1899 |
| NLB/19/482 | Copy letter from Robert William Frederick Harrison, to Sir George Gabriel Stokes, Fellow of the Royal Society | 12 October 1899 |
| NLB/19/633 | Copy letter from Robert William Frederick Harrison, to H Yule Oldham, King's College, Cambridge | 14 November 1899 |
| NLB/23/2/525 | Copy letter from Joseph Larmor, to [Richard Dixon] Oldham, [Fellow of the Royal Society], 1 Kensington Park Road, S.W. | 15 July 1904 |
| NLB/44/391 | Copy letter from Robert William Frederick Harrison [signed by Theodore E James] to Messrs Harrison & Sons | 3 July 1911 |
| NLB/58/119 | Copy letter from Edwin Deller, Assistant Secretary of the Royal Society; to [Richard Dixon] Oldham Esquire, FRS | 16 March 1920 |
| RR/21/46 | Referee's report by Richard Dixon Oldham, on a paper 'On the origin of the Indo-Gangetic trough, commonly called the Himalayan foredeep' by Sidney Gerald Burrard | 22 September 1914 |
| NLB/54/377 | Copy letter from [Robert William Frederick Harrison, Assistant Secretary of the Royal Society]; to Dr. [Aubrey] Strahan, Chairman of the Geology Committee and FRS | 25 April 1917 |
| NLB/58/814 | Copy letter from David Prain, Treasurer of the Royal Society; to [Richard Dixon] Oldham Esquire, FRS | 21 June 1920 |
| AP/79/19 | Unpublished paper, 'The frequency of earthquakes in Italy in the years 1896-1914' by R D [Richard Dixon] Oldham | [1920] |
| NLB/69/45 | Copy letter from Henry Hallett Dale, Secretary of the Royal Society; to [Richard Dixon] Oldham Esq., FRS | 17 December 1925 |
| NLB/58/244 | Copy letter from Edwin Deller, Assistant Secretary of the Royal Society; to [Richard Dixon] Oldham, FRS | 12 April 1920 |
| NLB/55/344 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to [Richard Dixon] Oldham Esq, FRS | 05 March 1918 |
| NLB/59/4 | Copy letter from Edwin Deller, Assistant Secretary of the Royal Society; to [Richard Dixon] Oldham Esquire, FRS | 9 July 1920 |
| RR/14/213 | Referee's report by Cargill Gilston Knott, on a paper 'On the propagation of earthquake motion to great distances' by Richard Dixon Oldham | nd [July 1899] |
| RR/14/214 | Letter from Cargill Gilston Knott, to Arthur William Rucker, regarding a paper 'On the propagation of earthquake motion to great distances' by Richard Dixon Oldham | 27 July 1899 |
| RR/14/212 | Referee's report by George Howard Darwin, on a paper 'On the propagation of earthquake motion to great distances' by Richard Dixon Oldham | 15 July 1899 |
| RR/14/211 | Referee's report by John Milne, on a paper 'On the propagation of earthquake motion to great distances' by Richard Dixon Oldham | nd [July 1899] |
| NLB/60/353 | Copy letter from William Bate Hardy, Secretary of the Royal Society; to [Richard Dixon] Oldham Esquire, FRS | 21 January 1921 |
| AP/76/2 | Unpublished paper, 'On the seismic effect of tidal stresses' by R [Richard] Dixon Oldham | 1904 |
| NLB/62/69 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to [Richard Dixon] Oldham Esquire, FRS | 25 November 1921 |
| NLB/66/215 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Dr. [John Edward] Marr, FRS | 18 March 1924 |
| NLB/66/584 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to [Richard Dixon] Oldham, Esq., FRS | 31 May 1924 |
| NLB/69/5 | Copy letter from Henry Hallett Dale, Secretary of the Royal Society; to [Richard Dixon] Oldham, FRS | 10 December 1925 |
| NLB/66/546 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Messr. Coutts and Co. | 29 May 1924 |
| NLB/66/547 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to [Richard Dixon] Oldham, FRS | 29 May 1924 |
| RR/16/220 | Referee's report by Charles Chree, on a paper 'The seismic effect of tidal stresses' by Richard Dixon Oldham | 6 June 1904 |
| RR/16/217 | Memoranda from Robert William Frederick Harrison, and reply from Hugh Longbourne Callendar and Joseph Larmor, on a paper 'On the seismic effect of tidal stresses' by Richard Dixon Oldham | 10 May 1904 |
| 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 |
| EC/1911/12 | Oldham, Richard Dixon: certificate of election to the Royal Society | |
| NLB/19/449 | Copy letter from Robert William Frederick Harrison, to Professor George Carey Foster, Fellow of the Royal Society | 5 October 1899 |
| RR/24/73 | Referee's report by George Walker Walker, on a paper 'The support and origin of the mountains of central Asia' by Richard Dixon Oldham | [May 1917] |
| RR/16/216 | Referee's report by George Howard Darwin, on a paper 'The seismic effect of tidal stresses' by Richard Dixon Oldham | 7 May 1904 |