| RefNo | Title | Date |
| MC/10/334 | Letter from Henry White, London, to W [William] Spottiswoode, [Treasurer of the Royal Society] | 22 January 1876 |
| MM/15/66 | Report by William Spottiswoode on a paper by Logan | 25 June 1874 |
| EC/1853/15 | Spottiswoode, William: certificate of election to the Royal Society | |
| MM/11/34 | Letter from the Treasury to the William Spottiswoode, President of the Royal Society | 10 November 1881 |
| MM/12/123 | Letter from Warren de la Rue, 73 Portland Place, to William Spottiswoode | 5 July 1880 |
| MM/12/98 | Letter from William Spottiswoode, Athenaeum, to Warren de la Rue | 26 February 1880 |
| MM/11/43 | Note of a meeting concerning a William Spottiswoode memorial | 7 December 1883 |
| MM/11/35 | Letter from the Treasury to the William Spottiswoode, President of the Royal Society | 31 December 1881 |
| MM/12/113 | Letter from Warren de la Rue, 75 Portland Place, to William Spottiswoode | 7 June 1880 |
| MM/16/109 | Photograph of a matriculation of William Spottiswoode's coat of arms for a panel in his honour at Harrow School | 1958 |
| MM/17/16 | Letter from CM Ingleby to William Spottiswoode | 15 June 1880 |
| MM/17/19 | Letter from Arthur Auwers to William Spottiswoode | 15 July 1880 |
| DM/7/46 | Letter from Rev A Hunter Dunn to William Spottiswoode, Treasurer, Royal Society | 30 May 1878 |
| DM/7/21 | Letter from E Clifton to William Spottiswoode, Treasurer, Royal Society | 14 May 1873 |
| DM/7/20 | Letter from E Clifton to William Spottiswoode, Treasurer, Royal Society | 30 April 1873 |
| MC/12/158 | Letter from E Collegue [?], Secretary of the Committee of the 'Annals of Bridges and Roads', Ministry of Public Works, Paris, to [William Spottiswoode], President of the Royal Society | 21 March 1881 |
| DM/7/28 | Letter from E Clifton to William Spottiswoode, Treasurer, Royal Society | 29 October 1873 |
| DM/7/91 | Letter from William Spottiswoode and John Evans, Treasurer, Royal Society to R Assheton Cross, Home Secretary | 12 December 1879 |
| DM/7/25 | Letter from E Clifton to William Spottiswoode, Treasurer, Royal Society | 16 July 1873 |
| DM/7/15 | Letter from J P Gassiot to William Spottiswoode, Treasurer, Royal Society | 24 December 1872 |
| IM/004343 | Spottiswoode, William | nd |
| MS/743/1/84 | Letter from William Spottiswoode, 50 Grosvenor Place, to [John Hall] Gladstone | 1 February 1875 |
| IM/004344 | Spottiswoode, William | nd |
| MC/9/590 | Letter from Charles Barry, 1 Westminster Chambers, to W [William] Spottiswoode, [Treasurer of the Royal Society] | 25 June 1873 |
| MC/11/325 | Letter from C E [Charles Edward] Trevelyan, 8 Grosvenor Crescent, to William Spottiswoode, President of the Royal Society | 3 April 1879 |
| NLB/2/892 | Copy letter from Herbert Rix, to R Tucker, 27 Cantlowes Road, N.W. | 6 December 1888 |
| NLB/10/687 | Copy letter from Herbert Rix, to William Botting Hemsley, Fellow of the Royal Society | 19 January 1895 |
| MC/12/195 | Letter from Michele Viparetti [?], Avellino, Italy, to William Spottiswoode, [President of the Royal Society], London | 1 September 1881 |
| RR/3/165 | Referee's report by William Spottiswoode, on a paper 'On the representation of polyedra' by Thomas Penyngton Kirkman | 9 February 1856 |
| NLB/19/611 | Copy letter from Robert William Frederick Harrison, to Sir Frederick Bramwell, Fellow of the Royal Society | 9 November 1899 |
| MC/11/9 | Letter from H M Senobren [?], 35 Queen's Gate, Kensington, London, to [William] Spottiswoode, [Treasurer of the Royal Society] | 25 January 1877 |
| MC/10/65 | Letter from G G [George Gabriel] Stokes, [Secretary of the Royal Society], Burlington House, London, to [William Spottiswoode], Treasurer of the Royal Society | 30 January 1874 |
| MC/10/9 | Letter from E [Edward] Stirling, Stirling House, Mont au Pretse [?], St Heliers, Jersey, to W [William] Spottiswoode, 50 Grosvenor Place, London | 5 August 1873 |
| RR/7/212 | Referee's report by Henry John Stephen Smith, on a paper 'On the contact of surfaces' by William Spottiswoode | 7 November 1872 |
| RR/4/248 | Referee's report by Batholomew Price, on a paper 'On the calculus of functions' by William Spottiswoode | 12 February 1862 |
| MC/12/182 | Letter from R R W [Ralph Robert Wheeler] Lingen, Treasury Chambers, to [William Spottiswoode], President of the Royal Society | 20 June 1881 |
| RR/4/51 | Referee's report by William Spottiswoode, on a paper 'On the double tangents of a curve of the fourth order' by Arthur Cayley | 3 August 1861 |
| RR/4/145 | Referee's report by William Spottiswoode, on a paper 'On the theory of the polyedra' by Thomas Penynton Kirkman | 21 February 1862 |
| RR/4/243 | Referee's report by William Spottiswoode, on a paper 'On systems of linear indeterminate equations and congruences' by Henry John Stephen Smith | 12 April 1861 |
| RR/4/249 | Referee's report by Arthur Cayley, on a paper 'On the calculus of symbols' by William Spottiswoode | 17 February 1862 |
| RR/4/246 | Referee's report by Arthur Cayley, on a paper 'On an extended form of the index symbol in the calculus of operations' by William Spottiswoode | 23 February 1860 |
| RR/5/38 | Referee's report by William Spottiswoode, on a paper 'On certain developable surfaces' by Arthur Cayley | 14 January 1863 |
| RR/2/227 | Referee's report by William Fishburn Donkin, on a paper 'Researches on the theory of invariants' by William Spottiswoode | 2 May 1855 |
| RR/7/72 | Referee's report by James Joseph Sylvester, on a paper 'On the contact of conics with surfaces' by William Spottiswoode | 28 May 1870 |
| RR/5/223 | Referee's report by William Spottiswoode, on a paper 'On the calculus of symbols.—Third memoir' by William Henry Leighton Russell | 16 June 1863 |
| RR/4/247 | Referee's report by William Fishburn Donkin, on a paper 'On an extended form of the index symbol in the calculus of operations' by William Spottiswoode | 12 March 1860 |
| MC/12/285 | Letter from A C Cooke, Ordnance Survey Office, Southampton, to [William] Spottiswoode, [President of the Royal Society] | 5 December 1882 |
| RR/4/252 | Referee's report by Thomas Archer Hirst, on a paper 'On the contact of curves' by William Spottiswoode | 28 February 1862 |
| RR/7/16 | Referee's report by William Spottiswoode, on a paper 'A ninth memoir on quantics' by Arthur Cayley | 30 May 1870 |
| RR/7/71 | Referee's report by Arthur Cayley, on a paper 'On the contact of conics with surfaces' by William Spottiswoode | 20 April 1870 |
| RR/6/56 | Referee's report by William Spottiswoode, on a paper 'An eighth memoir on quantics' by Arthur Cayley | 25 February 1867 |
| RR/4/43 | Referee's report by William Spottiswoode, on a paper 'On the analytical theory of the conic' by Arthur Cayley | 8 June 1862 |
| RR/4/41 | Referee's report by William Spottiswoode, on a paper 'On Tschirnhausen’s transformation' by Arthur Cayley | 15 January 1862 |
| RR/6/50 | Referee's report by William Spottiswoode, on a paper 'A supplementary memoir on the theory of matrices' by Arthur Cayley | 4 February 1866 |
| RR/7/83 | Referee's report by William Spottiswoode, on a paper 'On cyclides and sphero-quartics' by John Casey | 6 September 1871 |
| RR/4/40 | Referee's report by William Spottiswoode, on a paper 'On the porism of the in-and-circumscribed polygon' by Arthur Cayley | 27 June 1861 |
| RR/7/403 | Referee's report by Arthur Cayley, on a paper 'On multiple contact of surfaces' by William Spottiswoode | 26 July 1875 |
| RR/8/260 | Referee's report by Warren de la Rue, on a paper 'On the sensitive state of vacuum discharges.—Part II' by William Spottiswoode and John Fletcher Moulton, Baron Moulton | 26 April 1880 |
| RR/8/343 | Referee's report by Arthur Cayley, on a paper 'On the forty-eight coordinates of a cubic curve in space' by William Spottiswoode | 28 February 1881 |
| RR/8/344 | Referee's report by Henry John Stephen Smith, on a paper 'On the forty-eight coordinates of a cubic curve in space' by William Spottiswoode | 23 March 1881 |
| RR/8/208 | Letter from William Spottiswoode, to George Gabriel Stokes, regarding a paper 'On the sensitive state of electrical discharges through rarefied gases' by William Spottiswoode and John Fletcher Moulton, Baron Moulton | 28 June 1879 |
| RR/8/323 | Letter from Thomas Henry Huxley, to William Spottiswoode, regarding a paper 'On toroidal functions' by William Mitchinson Hicks | 2 October 1881 |
| MC/12/205 | Letter from G G [George Gabriel] Stokes, [Secretary of the Royal Society], Lensfield Cottage, Cambridge, to [William] Spottiswoode, [President of the Royal Society] | 11 October 1881 |
| RR/3/63 | Referee's report by William Spottiswoode, on a paper 'Sixth memoir of quantics' by Arthur Cayley | 28 December 1858 |
| RR/6/52 | Referee's report by William Spottiswoode, on a paper 'Addition to the memoir on Tschirnhausen's transformation' by Arthur Cayley | 2 March 1866 |
| RR/4/253 | Referee's report by Arthur Cayley, on a paper 'On the contact of curves' by William Spottiswoode | 17 February 1862 |
| MC/12/170 | Letter from A [Auguste] Daubrée, National School of Mines, Paris, to William Spottiswoode, President of the Royal Society | 9 May 1881 |
| MC/12/192 | Letter from Lyon Playfair, House of Commons, to [William] Spottiswoode, [President of the Royal Society] | 28 July 1881 |
| MS/426/491 | Note of a letter from [the Secretaries of] the Royal Society; to new Fellows and Foreign Members | 3 June 1853 |
| MC/12/157 | Letter from J W [Joseph William] Copley, Travellers' Club, Pall Mall, to [William Spottiswoode], President of the Royal Society and to the Council and Fellows of the Royal Society | 21 March 1881 |
| MS/427/81 | Copy letter from [Thomas Henry] Huxley, Secretary of the Royal Society; to the Secretary, Governing Body, Westminster School | 20 January 1881 |
| MS/427/283 | Copy letter from [George Gabriel] Stokes, Secretary of the Royal Society; to Leonard Courtney, M.P, Treasury | 28 June 1883 |
| MC/12/338 | Letter from J [Jules] Barrois, London, to [William Spottiswoode], President of the Royal Society, London | 20 June 1883 |
| MS/427/54 | Copy letter from [William] Spottiswoode, President of the Royal Society; to the Under Secretary of State for India | 7 September 1880 |
| MS/427/48 | Copy letter from [William] Spottiswoode, President of the Royal Society; to the Rt. Hon. [William Ewart] Gladstone, Combe Bank, Sevenoaks | 15 July 1880 |
| MS/427/97 | Copy letter from [George Gabriel] Stokes, Secretary of the Royal Society; to M. Berger, Commissaine-General of the [Exposition Internationale] d'Électricité | 28 March 1881 |
| MC/12/191 | Letter from F Camens [?], Ministry of Post & Telegraphs, Paris, to W [William] Spottiswoode, President of the Royal Society, Burlington House, London | 25 July 1881 |
| MS/427/286 | Copy letter from [Michael] Foster, Secretary of the Royal Society; to the Principal Librarian, British Museum | 5 July 1883 |
| MC/12/303 | Letter from Leonard Courtney, Treasury Chambers, to [William Spottiswoode], President of the Royal Society | 8 February 1883 |
| RR/4/36 | Referee's report by William Spottiswoode, on two unnamed papers by Arthur Cayley | 27 May 1859 |
| MS/427/110 | Copy letter from [Thomas Henry] Huxley, Secretary of the Royal Society; to the Secretary of the H. M. Treasury | 17 June 1881 |
| MC/12/240 | Letter from W J Colville [?], Clarence House, St James's, to W [William] Spottiswoode, President of the Royal Society | 20 March 1882 |
| MC/10/222 | Letter from T A [?] Jaques, 83 Cheapside, to W [William] Spottiswoode, Treasurer of the Royal Society, Burlington House | 16 February 1875 |
| MC/12/68 | Letter from R R W [Ralph Robert Wheeler] Lingen, Treasury Chambers, Whitehall, to [William Spottiswoode], President of the Royal Society, Burlington House | 16 June 1880 |
| MC/12/225 | Letter from Ad [Adolphe] Wurtz, President of the Academy of Sciences, Paris, to [William Spottiswoode], President of the Royal Society | 5 December 1881 |
| DM/7/17 | Letter from William Tite to William Spottiswoode, Treasurer, Royal Society | 27 January 1873 |
| DM/6/38 | Letter from H Reeve to William Spottiswoode, Treasurer, Royal Society | 13 February 1875 |
| DM/7/32 | Letter from J P Gassiot to William Spottiswoode, Treasurer, Royal Society | 7 November 1873 |
| MC/9/440 | Letter from Willm [William] Tite, 42 Lowndes Square, to W [William] Spottiswoode, [Treasurer of the Royal Society] | 3 December 1872 |
| MC/12/331 | Letter from J W [John William] Dawson, McGill College, Montreal, to W [William] Spottiswoode, President of the Royal Society | 28 May 1883 |
| NLB/10/525 | Copy letter from Michael Foster, to Messrs W H & C Spottiswoode | 12 December 1894 |
| RR/3/169 | Referee's report by William Spottiswoode, on a paper 'On autopolar polyedra' by Thomas Penyngton Kirkman | 8 April 1857 |
| RR/4/223 | Referee's report by William Spottiswoode, on a paper 'On the calculus of symbols - third memoir' by William Henry Leighton Russell | 22 June 1862 |
| RR/7/485 | Referee's report by William Kingdon Clifford, on a paper 'On multiple contact of surfaces' by William Spottiswoode | 1876 |
| RR/8/206 | Referee's report by Warren de la Rue, on a paper 'On the sensitive state of electrical discharges through rarefied gases' by William Spottiswoode and John Fletcher Moulton, Baron Moulton | 12 June 1879 |
| MC/12/75 | Letter from Jas [James] Risdon Bennett, 22 Cavendish Square, to [William Spottiswoode], President of the Royal Society | 5 July 1880 |
| MC/11/11 | Letter from Mattw [Matthew] Collins to [Joseph Dalton Hooker], President of the Royal Society and to the Members | c. January 1877 |
| RR/4/49 | Referee's report by William Spottiswoode, on two papers 'On an extension of Arbogast’s method of derivations' and 'On the equation for the product of the differences of all but one of the roots of a given equation' by Arthur Cayley | 7 February 1861 |
| RR/8/15 | Referee's report by William Spottiswoode, on a paper 'Experimental researches on the electric discharge with the chloride of silver battery' by Warren de la Rue and Hugo Muller | 27 August 1877 |
| RR/8/322 | Letter from William Spottiswoode, to Thomas Henry Huxley, regarding a paper 'On toroidal functions' by William Mitchinson Hicks | 23 July 1881 |
| MC/12/91 | Letter from G G [George Gabriel] Stokes, Observatory, Armagh, Ireland, to [William] Spottiswoode, [President of the Royal Society] | 4 September 1880 |
| P/0125 | Portrait of Spottiswoode, William | |
| P/0124 | Portrait of Spottiswoode, William | 1884 |
| PT/64/4 | Paper, 'On the calculus of symbols' by William Spottiswoode | [1861] |
| PT/71/5 | Paper, 'On the sextactic points of a plane curve' by William Spottiswoode | [1865] |
| MC/9/185 | Letter from William Huggins, Upper Tulse Hill, to [William] Spottiswoode, [Treasurer of the Royal Society] | 30 March 1871 |
| MC/12/148 | Letter from T H [Thomas Henry] Huxley, [Secretary of the Royal Society], South Kensington, to W [William] Spottiswoode, President of the Royal Society | 15 February 1881 |
| MC/10/188 | Letter from G G [George Gabriel] Stokes, [Secretary of the Royal Society], Lensfield Cottage, Cambridge, to [William] Spottiswoode, [Treasurer of the Royal Society] | 1 January 1875 |
| RR/2/233 | Referee's report by William Spottiswoode, on a paper 'On a theory of the syzygetic relations of two rational integral functions, comprising an application to the theory of Sturm’s functions, and that of the greatest algebraical common measure' by James Joseph Sylvester | 5 August 1853 |
| RR/4/46 | Referee's report by William Spottiswoode, on a paper 'A seventh memoir on quantics' by Arthur Cayley | 4 May 1861 |
| RR/4/50 | Referee's report by William Spottiswoode, on a paper 'On a new auxiliary equation in the theory of equations of the fifth order' by Arthur Cayley | 4 May 1861 |
| RR/3/171 | Referee's report by William Spottiswoode, on a paper 'On the partitions of the R-pyramid, being the first class of R-gonous X-edra' by Thomas Penyngton Kirkman | 28 January 1858 |
| RR/4/250 | Referee's report by Batholomew Price, on a paper 'On internal and external division in the calculus of symbols' by William Spottiswoode | 6 March 1862 |
| PT/60/2 | Paper, 'On an extended form of the index symbol in the calculus of operations' by William Spottiswoode | [1859] |
| MC/12/286 | Letter from Henry E [Edward] Armstrong, The London Institution, to [William Spottiswoode], President of the Royal Society | 6 December 1882 |
| MC/12/288 | Letter from A C Cooke, Ordnance Survey Office, Southampton, to [William] Spottiswoode, [President of the Royal Society] | 11 December 1882 |
| MC/12/339 | Letter from Leonard Courtney, Treasury Chambers, to [William Spottiswoode], President of the Royal Society | 23 June 1883 |
| RR/4/226 | Referee's report by William Spottiswoode, on a paper 'On the calculus of functions' by William Henry Leighton Russell | 21 January 1862 |
| RR/7/211 | Referee's report by Arthur Cayley, on a paper 'On the contact of surfaces' by William Spottiswoode | 10 April 1872 |
| RR/5/253 | Copy of a letter from George Gabriel Stokes, to William Spottiswoode, regarding a paper 'On the equations of rotation of a solid body about a fixed point' by William Spottiswoode | 30 July 1863 |
| PT/65/2 | Paper, 'On a new method of approximation applicable to elliptic and ultra-elliptic functions (second memoir)' by Charles W [Watkins] Merrifield | March 1862 |
| RR/5/252 | Referee's report by Arthur Cayley, on a paper 'On the equations of rotation of a solid body about a fixed point' by William Spottiswoode | 28 July 1863 |
| RR/5/254 | Letter from William Spottiswoode, to George Gabriel Stokes, regarding a paper 'On the equations of rotation of a solid body about a fixed point' by William Spottiswoode | 3 August 1863 |
| S/0022 | Sculpture bust of Spottiswoode, William | |
| PP/2/6 | Paper, 'Note on W [William Henry Leighton] Russell's paper "On certain geometrical theorems, No. 2"' by William Spottiswoode | 1882 |
| RR/3/47 | Referee's report by William Spottiswoode, on a paper 'Third memoir upon caustics' by Arthur Cayley | 24 April 1856 |
| MC/11/261 | Letter from Few & Co, 19 Surrey Street, Strand, Victoria Embankment, London, to Wm [William] Spottiswoode, [Treasurer of the Royal Society], 41 Grosvenor Place | 29 October 1878 |
| MC/5/327 | Letter from Ths [Thomas] Goldstücker, 12 Chalcot Terrace, Primrose Hill, to Dr [William] Sharpey, [Secretary of the Royal Society] | 13 January 1858 |
| MS/743/1/83 | Letter from William Spottiswoode, Coombe Bank, Sevenoaks, to [John Hall] Gladstone | 20 October 1874 |
| MC/11/364 | Draft letter from Robt [Robert] Mallet, Enmore, The Grove, Clapham Road, to W [William] Spottiswoode, President of the Royal Society, Burlington House | 21 May 1879 |
| MC/7/219 | Letter from W [William] Spottiswoode to Dr [William] Sharpey, [Secretary of the Royal Society] | 30 May 1865 |
| MC/7 | Volume 7 of miscellaneous correspondence regarding business matters, sent to the Royal Society | 1864-1866 |
| PP/1/28 | Paper, 'Note on W [William Henry Leighton] Russell's paper "On certain definite integrals, No. 10"' by William Spottiswoode | 1882 |
| RR/2/234 | Referee's report by William Spottiswoode, on a paper 'On a theory of the syzygetic relations of two rational integral functions, comprising an application to the theory of Sturm’s functions, and that of the greatest algebraical common measure [supplement]' by James Joseph Sylvester | 31 October 1853 |
| RR/5/119 | Referee's report by William Spottiswoode, on a paper 'On the volumes of pedal surfaces' by Thomas Archer Hirst | 1 April 1863 |
| RR/5/251 | Referee's report by William Fishburn Donkin, on a paper 'On the equations of rotation of a solid body about a fixed point' by William Spottiswoode | 22 June 1863 |
| MC/8/441 | Letter from W [William] Spottiswoode, 50 Grosvenor Place, to Sir Edward Sabine, President of the Royal Society | 6 November 1869 |
| MC/9/181 | Letter from G B [George Biddell] Airy, Flamsteed House, Greenwich, to William E Spottiswoode, Treasurer of the Royal Society | 20 March 1871 |
| MC/9/206 | Letter from W [William] Spottiswoode, [Treasurer of the Royal Society], Her Majesty's Printing Office, London, to the Royal Society | 26 May 1871 |
| MC/9/212 | Letter from Edward Sabine, President of the Royal Society, Burlington House, London, to William Spottiswoode, Treasurer of the Royal Society | 7 June 1871 |
| MC/9/207 | Copy letter from W S [William Spottiswoode], [Treasurer of the Royal Society], Her Majesty's Printing Office, to [John Peter] Gassiot | 26 May 1871 |
| MC/9/236 | Letter from J P [John Peter] Gassiot, Southsea, to W [William] Spottiswoode, [Treasurer of the Royal Society] | 10 July 1871 |
| MC/9/234 | Letter from Edward Sabine, [President of the Royal Society], to Wm [William] Spottiswoode, Treasurer of the Royal Society | 5 July 1871 |
| MC/9/235 | Letter from W [William] Sharpey, Hampstead, to W [William] Spottiswoode, Treasurer of the Royal Society | 6 July 1871 |
| MC/9/238 | Letter from Robert H [Henry] Scott, Honorary Secretary, Meteorological Office, 116 Victoria Street, London, to W [William] Spottiswoode, Treasurer of the Royal Society | 15 July 1871 |
| MC/9/259 | Letter from Edward Sabine, President of the Royal Society, Ferryside, Carmathenshire, to Wm [William] Spottiswoode, Treasurer of the Royal Society | 30 September 1871 |
| MC/9/282 | Letter from Willm [William] Tite, 42 Lowndes Square, to W [William] Spottiswoode, [Treasurer of the Royal Society] | 16 November 1871 |
| MC/9/313 | Letter from E [Edward] Frankland, President of the Chemical Society, Burlington House, to [William Spottiswoode], Treasurer of the Royal Society | 26 January 1872 |
| MC/9/326 | Letter from E [Edward] Frankland, President of the Chemical Society, Burlington House, to W [William] Spottiswoode, Treasurer of the Royal Society | 12 February 1872 |
| MC/9/338 | Letter from W [William] Spottiswoode, 50 Grosvenor Place, to the Royal Society | 9 March 1872 |
| RR/2/63 | Referee's report by William Spottiswoode, on a paper 'On a class of differential equations, including those which occur in dynamical problems. - Part II' by William Fishburn Donkin | 28 June 1855 |
| MC/9/441 | Letter from Robert H [Henry] Scott, Honorary Secretary, Kew Observatory, Richmond, Surrey, to W [William] Spottiswoode, [Treasurer of the Royal Society] | 5 December 1872 |
| MC/9/437 | Letter from S [Sydney] Smirke, Tunbridge Wells, to W [William] Spottiswoode, [Treasurer of the Royal Society] | 27 November 1872 |
| MC/9/473 | Letter from G G [George Gabriel] Stokes, [Secretary of the Royal Society], Cambridge, to [William] Spottiswoode, [Treasurer of the Royal Society] | 10 January 1873 |
| MC/9/480 | Letter from W [William] Spottiswoode, [Treasurer of the Royal Society], Her Majesty's Printing Office, London, to [George Gabriel] Stokes, [Secretary of the Royal Society] | 23 January 1873 |
| MC/9/462 | Letter from H [Henry] Reeve, Privy Council Office, to W [William] Spottiswoode, [Treasurer of the Royal Society] | 23 December 1872 |
| MC/9/488 | Letter from John Thickett [?], 66 Great Russell Street, to W [William] Spottiswoode, [Treasurer of the Royal Society] | 5 February 1873 |
| MC/9/509 | Letter from William Tite, Atkinson's Hotel, Torquay, to [William] Spottiswoode, [Secretary of the Royal Society] | 5 March 1873 |
| MC/9/508 | Letter from Sydney Smirke, Royal Academy, to W [William] Spottiswoode, [Secretary of the Royal Society] | 5 March 1873 |
| MC/9/513 | Letter from Sydney Smirke, Tunbridge Wells, to W [William] Spottiswoode, [Treasurer of the Royal Society] | 8 March 1873 |
| MC/9/549 | Letter from David Ferrier, 23 Somerset Street, Portman Square, to W [William] Spottiswoode, Treasurer of the Royal Society | 9 May 1873 |
| MC/9/524 | Letter from Alexd W [Alexander William] Williamson, University College, London, to [William] Spottiswoode, [Treasurer of the Royal Society] | 22 March 1873 |
| MC/9/558 | Letter from George Russell, Secretary of HM Office of Works, to Wm [William] Spottiswoode, [Treasurer of the Royal Society], Burlington House | 20 May 1873 |
| MC/9/581 | Letter from Robert H [Henry] Scott, Director of the Meteorological Office, 116 Victoria Street, London, to the Secretary of the Royal Society | 16 June 1873 |
| MC/9/552 | Letter from George Russell, Secretary of HM Office of Works, to Wm [William] Spottiswoode, [Treasurer of the Royal Society], Burlington House | 12 May 1873 |
| MC/10/4 | Letter from Charles Barry, 1 Westminster Chambers, Victoria Street, Westminster, to W [William] Spottiswoode, [Secretary of the Royal Society] | 22 July 1873 |
| MC/10/19 | Letter from Sydy [Sydney] Smirke, Tunbridge Wells, to W [William] Spottiswoode, [Secretary of the Royal Society] | 10 September 1873 |
| MC/10/21 | Letter from Sydy [Sydney] Smirke, Tunbridge Wells, to W [William] Spottiswoode, [Secretary of the Royal Society] | 16 September 1873 |
| MC/10/22 | Letter from W [William] Spottiswoode, British Association, Bradford, to the Royal Society | 18 September 1873 |
| MC/9 | Volume 9 of miscellaneous correspondence regarding business matters, sent to the Royal Society | 1870-June 1873 |
| MC/10/66 | Letter from Warren de la Rue, 73 Portland Place, to W [William] Spottiswoode, Treasurer of the Royal Society | 31 January 1874 |
| MC/10/264 | Letter from James Caird, 8 Queen Gate Gardens, to [William Spottiswoode], Treasurer of the Royal Society | 7 June 1875 |
| MC/10/141 | Letter from Horne & Hunter [?], 6 Lincoln's Inn Fields, London, to Walter White, [Assistant Secretary of the Royal Society], Burlington House | 13 July 1874 |
| MC/10/142 | Letter from S [Samuel] Carter, Quarry Hill, Battle, to W [William] Spottiswoode, Treasurer of the Royal Society | 13 July 1874 |
| MC/10/190 | Letter from Vernon Lushington, Admiralty, Whitehall, to W [William] Spottiswoode, [Treasurer of the Royal Society] | 7 January 1875 |
| MC/10/186 | Letter from William Huggins, Upper Tulse Hill, to [William] Spottiswoode, [Treasurer of the Royal Society] | 30 December 1874 |
| MC/12/146 | Letter from Francis Galton, 42 Rutland Gate, to [William Spottiswoode], President of the Royal Society | 1 February 1881 |
| MC/10/191 | Letter from John Evans, Nash Mills, Hemel Hempsted, to [William] Spottiswoode, [Treasurer of the Royal Society] | 11 January 1875 |
| MC/10/239 | Letter from J P [John Peter] Gassiot, St John's House, Ryde, to W [William] Spottiswoode, Treasurer of the Royal Society | 19 April 1875 |
| MC/10/340 | Letter from J W Stephenson, Equitable Assurance Office, Mansion House Street, Opposite the Mansion House, London, to Wm [William] Spottiswoode, [Treasurer of the Royal Society] | 29 January 1876 |
| MC/10/385 | Letter from O [Olaus] Henrici, University College, to [William] Spottiswoode, [Treasurer of the Royal Society] | 25 April 1876 |
| MC/10/410 | Letter from Henry White, London, to [William Spottiswoode], Treasurer of the Royal Society | 15 June 1876 |
| MC/10 | Volume 10 of miscellaneous correspondence regarding business matters, sent to the Royal Society | July 1873-1876 |
| MC/11/10 | Letter from Mattw [Matthew] Collins, corresponding member of the Society of Physics and Natural History of Bordeaux, 6 Marlboro Place, to Wm [William] Spottiswoode, Treasurer and Vice-President of the Royal Society | 27 January 1877 |
| MC/12/50 | Letter from T D Pigott, Controller, Stationery Office, to [William Spottiswoode], President of the Royal Society | 1 June 1880 |
| PT/64/4i | Paper, 'On the contact of curves' by William Spottiswoode | [1861] |
| MC/11/163 | Letter from W [William] Spottiswoode, [Treasurer of the Royal Society], Burlington House, London, to [George Gabriel] Stokes, [Secretary of the Royal Society] | 29 January 1878 |
| RR/2/226 | Referee's report by James Joseph Sylvester, on a paper 'Researches on the theory of invariants' by William Spottiswoode | 26 April 1855 |
| MC/11/242 | Letter from T D Pigott, Controller, Stationery Office, to [William Spottiswoode], Treasurer of the Royal Society | 1 August 1878 |
| MC/11/243 | Letter from Few & Co, 19 Surrey Street, Strand, Victoria Embankment, London, to W [William] Spottiswoode, [Treasurer of the Royal Society], Burlington House | 2 August 1878 |
| MC/12/101 | Letter from William Law, Treasury Chambers, to [William Spottiswoode], President of the Royal Society | 22 October 1880 |
| MC/11/307 | Letter from Franklin Coxworthy, author of 'Electrified Condition', Chertsey, Surrey, to William Spottiswoode, President of the Royal Society | 11 February 1879 |
| MC/11/282 | Letter from R R W [Ralph Robert Wheeler] Lingen, Treasury Chambers, to [William Spottiswoode], President of the Royal Society | 11 December 1878 |
| MC/11/296 | Letter from Dr Jos [Joseph] Staender, Royal Librarian, Royal Paulina Library, Münster, to [William Spottiswoode], President of the Royal Society and to the Council | 11 January 1879 |
| MC/11/301 | Letter from Richd [Richard] Assheton Cross, Secretary of State, Home Department, to [William Spottiswoode], President of the Royal Society | 29 January 1879 |
| MC/11/302 | Letter from Richd [Richard] Assheton Cross, Secretary of State, Home Department, to [William Spottiswoode], President of the Royal Society | 31 January 1879 |
| MC/11/280 | Letter from George F [Fergusson] Wilson, Heatherbank, Weybridge Heath, to W [William] Spottiswoode, Treasurer of the Royal Society | 9 December 1878 |
| MC/11/306 | Letter from Louis Mallet to [William] Spottiswoode, [President of the Royal Society] | 4 February 1879 |
| MC/11/321 | Letter from Henry J S [John Stephen] Smith, Meteorological Office, 116 Victoria Street, London, to W [William] Spottiswoode, President of the Royal Society | 24 March 1879 |
| MC/11/333 | Letter from H C Rohen [?], East India Club, 14 St James's Square, to [William] Spottiswoode, [President of the Royal Society] | 9 April 1879 |
| MC/11/342 | Letter from Joseph John Alley, topographical antiquarian and scientific draughtsman, Hope Terrace, Lower Broughton Road, Manchester, to William Spottiswoode, President of the Royal Society of London, 41 Grosvenor Place, London | 24 April 1879 |
| MC/11/344 | Letter from Sydney Williams, Williams & Norgate, 14 Henrietta Street, Covent Garden, London, to W [William] Spottiswoode, [President of the Royal Society] | 25 April 1879 |
| MC/11/312 | Letter from F [Fidèle] Motte, Dampremy, to [William Spottiswoode], President of the Royal Society, London | 22 February 1879 |
| MC/11/361 | Letter from Th [Theodor] Schwann, Liège, to William Spottiswoode, President of the Royal Society | 18 May 1879 |
| MC/11/367 | Letter from J S [Jean Servais] Stas, Brussels, to William Spottiswoode, President of the Royal Society, London | 27 May 1879 |
| MC/11/382 | Letter from A [Arthur] Auwers, Lindenstrasse 103, Berlin, to William Spottiswoode, [President of the Royal Society] | 16 June 1879 |
| AP/37/21 | Unpublished paper, 'Researches on the theory of invariants' by William Spottiswoode | 1854 |
| MC/12/42 | Letter from W H [William Henry] Preece, General Post Office, to W [William] E Spottiswoode, [President of the Royal Society] | 27 April 1880 |
| MC/11/410 | Letter from H S Carington, Secretary, The Whitworth Land Company Limited, 44 Charlton Street, Manchester, to W [William] Spottiswoode, [President of the Royal Society] | 30 July 1879 |
| MC/11/429 | Letter from A B Mitford, Office of Works, to [William] Spottiswoode, [President of the Royal Society] | 31 October 1879 |
| MC/11/405 | Letter from H Drory, Meirelbeke, near Ghent, to [William Spottiswoode], President of the Royal Society, London | 24 July 1879 |
| MC/11/409 | Letter from W [William] Spottiswoode, [President of the Royal Society], Athenaeum Club, Pall Mall, to the Royal Society | 28 July 1879 |
| MC/11/416 | Letter from Robert Hall, Admiralty, to [William Spottiswoode], President of the Royal Society | 9 September 1879 |
| MC/11/427 | Letter from Dr Jos [Joseph] Staender, Royal Librarian, Royal Paulina Library, Münster, to [William Spottiswoode], President of the Royal Society and to the Council | 18 October 1879 |
| MC/11/441 | Letter from R Launder [?], Assistant Secretary of the Office of Works, to W [William] Spottiswoode, President of the Royal Society, Burlington House | 21 November 1879 |
| RR/3/168 | Referee's report by William Spottiswoode, on a paper 'On the K-partitions of the R-gon and R-ace' by Thomas Penyngton Kirkman | 7 January 1857 |
| MC/11/430 | Letter from Edwin Dunkin, Kenwyn, Kidbrooke Park Road, Blackheath, to W [William] Spottiswoode, President of the Royal Society | 1 November 1879 |
| MC/11/434 | Letter from Horace Brown, Salem, Massachusetts, USA, to Wm [William] Spottiswoode, President of the Royal Society, London | 5 November 1879 |
| MC/12/2 | Letter from C E D Black, India Office, to [William] Spottiswoode, [President of the Royal Society] | 3 January 1880 |
| MC/11 | Volume 11 of miscellaneous correspondence regarding business matters, sent to the Royal Society | 1877-1879 |
| MC/12/13 | Letter from J H [John Hall] Gladstone, 17 Pembridge Square, to Wm [William] Spottiswoode, President of the Royal Society | 3 February 1880 |
| MC/12/19 | Letter from A F O [Adolphus Frederick Octavius] Liddell, Whitehall, to [William Spottiswoode], President of the Royal Society, Burlington House | 9 March 1880 |
| MC/12/30 | Letter from A [Albert] de Lapparent, President of the Geological Society of France, Paris, to [William Spottiswoode], President of the Royal Society | 2 April 1880 |
| MC/12/63 | Letter from John Tyndall, Royal Institution of Great Britain, to [William Spottiswoode], President of the Royal Society | 9 June 1880 |
| MC/12/62 | Letter from Jas [James] Risdon Bennett, Chairman of the Executive Committee, Royal College of Physicians, Pall Mall East, to [William Spottiswoode], President of the Royal Society | 8 June 1880 |
| MS/427/39 | Copy letter from [Thomas Henry] Huxley, Secretary of the Royal Society; to [Frederick Joseph] Bramwell Esq., FRS | 19 June 1880 |
| MC/12/71 | Letter from [William Spottiswoode], President of the Royal Society, Burlington House, to the Right Hon [Sir William Harcourt], Secretary of State for the Home Department | 19 June 1880 |
| MC/12/77 | Letter from John Evans, [Treasurer of the Royal Society], Nash Mills, Hemel Hempstead, to [William Spottiswoode], President of the Royal Society | 8 July 1880 |
| MC/12/81 | Letter from T H [Thomas Henry] Huxley, Science and Art Department South Kensington, to [William] Spottiswoode, [President of the Royal Society] | 17 July 1880 |
| MC/12/140 | Letter from Robert Hall, Admiralty, to [William Spottiswoode], President of the Royal Society, Burlington House | 13 January 1881 |
| MC/12/162 | Letter from Viscount Enfield, India Office, to [William Spottiswoode], President of the Royal Society | 11 May 1881 |
| MC/12/159 | Letter from John Scott Russell, Oak Lodge, Hamlet Road, Upper Norwood, to [William Spottiswoode], President of the Royal Society | 19 April 1881 |
| MC/12/167 | Letter from J H Cole [?], Treasury Chambers, to [William Spottiswoode], President of the Royal Society | 6 June 1881 |
| MC/12/152 | Letter from Ernst Curtius, Royal Academy of Sciences, Berlin, to W [William] Spottiswoode, President of the Royal Society, London | 11 March 1881 |
| MC/12/172 | Letter from G B [George Biddell] Airy, Playford near Ipswich, to William Spottiswoode, [President of the Royal Society] | 9 June 1881 |
| MC/12/190 | Letter from [?], President of the International Congress of Electricians, Ministry of Post & Telegraphs, Paris, to [William Spottiswoode], President of the Royal Society, Burlington House, Piccadilly, London | 13 July 1881 |
| MC/12/197 | Letter from C Robinson, secretary, 72 Bishopsgate Street within EC, to [William Spottiswoode], President of the Royal Society, London | 19 September 1881 |
| MC/12/207 | Letter from William Huggins, Upper Tulse Hill, to [William] Spottiswoode, [President of the Royal Society] | 17 October 1881 |
| MC/12/247 | Letter from L F [Luigi Federico] Menabrea, 35 Queen's Gate, to William Spottiswoode, President of the Royal Society | 1 May 1882 |
| MC/12/232 | Letter from T H [Thomas Henry] Farrer, Board of Trade, Whitehall Gardens, to [William] Spottiswoode, President of the Royal Society] | 6 February 1882 |
| MC/12/269 | Draft letter from W [William] Spottiswoode, Combe Bank, Sevenoaks, to an unknown correspondent | 11 September 1882 |
| MC/12/241 | Letter from J F D [John Fretcheville Dykes] Donnelly, Science and Art Department, London, to [William Spottiswoode], President of the Royal Society | 24 March 1882 |
| MC/12/243 | Letter from Arthur Schuster, The Owens College, Manchester, to [William] Spottiswoode, [President of the Royal Society] | 27 March 1882 |
| MC/12/234 | Letter from Warren de la Rue, Vice Chairman of the Kew Committee, Kew Observatory, Richmond, Surrey, to [William Spottiswoode], President of the Royal Society | 24 February 1882 |
| MC/12/237 | Letter from W [William] Doberck, Markree Observatory, Collooney, Ireland, to W [William] Spottiswoode, President of the Royal Society | 9 March 1882 |
| MC/12/250 | Letter from Dav [David] Milne-Home, Milne Graden, Coldstream, to the Duke of Richmond & Gordon, London | 19 May 1882 |
| MC/12/251 | Letter from the Duke of Richmond & Gordon, 49 Belgrave Square, to W [William] Spottiswoode, [President of the Royal Society] | 10 May 1882 |
| MC/12/268 | Draft letter from W [William] Spottiswoode, Combe Bank, Sevenoaks, to an unknown correspondent | 8 September 1882 |
| MC/12/272 | Letter from J H Cole [?], Treasury Chambers, to [William Spottiswoode], President of the Royal Society | 27 September 1882 |
| MC/12/271 | Letter from J H Cole [?], Treasury Chambers, to [William Spottiswoode], President of the Royal Society | 27 September 1882 |
| MC/12/273 | Letter from W H [William Henry] Barlow, High Combe, Old Charlton, to [William] Spottiswoode, [President of the Royal Society] | 2 October 1882 |
| MC/12/246 | Letter from J F D [John Fretcheville Dykes] Donnelly, Science and Art Department, London, to W [William] Spottiswoode, President of the Royal Society, Burlington House | 27 April 1882 |
| MC/12/296 | Letter from J C [John Couch] Adams, Observatory Cambridge, to [William Spottiswoode], President of the Royal Society | 13 January 1883 |
| MC/12/287 | Letter from Leonard Courtney, Treasury Chambers, to [William Spottiswoode], President of the Royal Society | 8 December 1882 |
| RR/4/148 | Second referee's report by William Spottiswoode, on a paper 'On the theory of the polyedra' by Thomas Penynton Kirkman | 4 July 1861 |
| MC/12/290 | Letter from J H Cole [?], Treasury Chambers, to [William Spottiswoode], President of the Royal Society | 18 December 1882 |
| MC/12/293 | Letter from R R W [Ralph Robert Wheeler] Lingen, Treasury Chambers, to [William Spottiswoode], President of the Royal Society, Burlington House | 1 January 1883 |
| MC/12/305 | Letter from Leonard Courtney, Treasury Chambers, to [William Spottiswoode], President of the Royal Society | 14 February 1883 |
| MC/12/300 | Letter from A C Cooke, Southampton, to [William] Spottiswoode, [President of the Royal Society] | 22 January 1882 |
| MC/12/281 | Letter from Robert H [Henry] Scott, Secretary of the Meteorological Office, 116 Victoria Street, London, to [William Spottiswoode], President of the Royal Society | 9 November 1882 |
| MC/12/304 | Letter from J [Jules] Janssen, Astrophysical Observatory of Paris, Sis Parc de Meudon, Leine & Oise, to [William Spottiswoode], President of the Royal Society | 8 February 1883 |
| MC/12/314 | Letter from Giulio Cangentano [?], Genua, Italy, to [William Spottiswoode], President of the Royal Society | 15 March 1883 |
| MC/12/329 | Letter from J H Cole [?], Treasury Chambers, to [William Spottiswoode], President of the Royal Society | 2 May 1883 |
| MC/12/307 | Letter from Richd [Richard] Grosvenor, Treasury Chambers, to [William Spottiswoode], President of the Royal Society, Burlington House | 22 February 1883 |
| MC/12/310 | Letter from Edw [Edward] Schunck, 13 Lansdowne Road, Wimbledon, to W [William] Spottiswoode, President of the Royal Society | 2 March 1883 |
| MC/12/306 | Letter from Robert H [Henry] Scott, Secretary of the Meteorological Office, 116 Victoria Street, London, to [William Spottiswoode], President of the Royal Society | 14 February 1883 |
| MC/12/322 | Letter from F [Frederick] Napier Broome, Government House, Mauritius, to [William Spottiswoode], President of the Royal Society | 18 April 1883 |
| MC/12/332 | Letter from J W [John William] Dawson, McGill College, Montreal, to [Walter] White, [Assistant Secretary of the Royal Society] | 28 May 1883 |
| MC/12/335 | Letter from J [John] Pope Hennessy, Governor, Government House, Mauritius, to [William Spottiswoode], President of the Royal Society, London | 12 June 1883 |
| MC/12 | Volume 12 of miscellaneous correspondence regarding business matters, sent to the Royal Society | 1880-1883 |
| PP/1/16/3 | Note, regarding 'On certain geometrical theorems, No. 1' by William Spottiswoode | [1881] |
| MC/12/259 | Letter from R R W [Ralph Robert Wheeler] Lingen, Treasury Chambers, to [William Spottiswoode], President of the Royal Society | 27 June 1882 |
| MC/12/242 | Letter from Arthur Schuster, 295 Upper Brook Street, Manchester, to [William] Spottiswoode, [President of the Royal Society] | 27 March 1882 |
| MC/12/295 | Letter from W T [William Turner] Thiselton Dyer, Assistant Director of Royal Gardens, Kew, to W [William] Spottiswoode, President of the Royal Society, Burlington House | 10 January 1883 |
| MC/12/342 | Letter from Leonard Courtney, Treasury Chambers, to Professor [George Gabriel] Stokes, [Secretary of the Royal Society] | 29 June 1883 |
| MS/427/1 | Copy letter from [William] Spottiswoode, President of the Royal Society; to the Chief Commissioner of H. M. Works. | 3 November 1879 |
| MS/427/36 | Copy letter from [Thomas Henry] Huxley, Secretary of the Royal Society; to the Secretary, Treasury | 18 June 1880 |
| MC/12/52 | Letter from F J [Frederick Joseph] Bramwell, 37 Great George Street, Westminster, to W [William] Spottiswoode, President of the Royal Society, Burlington House | 3 June 1880 |
| MS/427/134 | Copy letter from [Thomas Henry] Huxley, Secretary of the Royal Society; to Colonel [John] Donnelly | 1 November 1881 |
| MS/427/123 | Copy letter from [William] Spottiswoode, President of the Royal Society; to the Minister of Posts and Telegraphs | 16 July 1881 |
| RR/8/66 | Referee's report by Henry John Stephen Smith, on a paper 'On hyperjacobian surfaces and curves' by William Spottiswoode | 14 June 1877 |
| RR/9/8 | Letter from Andrew Noble, on a paper 'Chemical theory of gunpowder' by Heinrich Debus to William Spottiswoode | 21 March 1882 |
| MC/8 | Volume 8 of miscellaneous correspondence regarding business matters, sent to the Royal Society | 1867-1869 |
| AP/62/5 | Unpublished paper, 'The attitudes of animals in motion' by E [Eadweard] Muybridge | 1883 |
| AP/61/8 | Unpublished photograph, 'The Cranbourne meteorite' by Walter Flight | 1882 |
| PP/1/16 | Paper, 'On certain geometrical theorems, No. 1' by W H L [William Henry Leighton] Russell | 1881 |
| PP/1/14 | Paper, 'On a new electrical storage battery' by Henry Sutton | 1881 |
| PP/1/20/1 | Manuscript, regarding 'On a new electrical storage battery' by Henry Sutton | [1881-1882] |
| MS/257/4/106 | Copy of a letter from Edward Sabine, 13 Ashley Place to William Spottiswoode | 7 June 1871 |
| PP/1/20 | Appendix, regarding 'On a new electrical storage battery' by Henry Sutton | [1881-1882] |
| MS/257/4/232 | Letter from William Spottiswoode, H M Printing Office to [Edward Sabine] | 13 December 1864 |
| RR/3/58 | Referee's report by William Spottiswoode, on four papers 'Fourth and fifth memoirs on quantics'; 'On the tangential of a cubic'; 'On the surface which is the envelope of planes through the points of an ellipsoid at right angles to the radius vectors from the centre' by Arthur Cayley | 29 April 1858 |
| PP/1/40 | Paper, 'On the movement of gas in "vacuum discharges"' by William Spottiswoode and J [John] Fletcher Moulton | 1882 |
| RR/2/60 | Referee's report by William Spottiswoode, on a paper 'On a class of differential equations, including those which occur in dynamical problems.- Part I' by William Fishburn Donkin | 7 April 1854 |
| RR/2/228 | Referee's report by Arthur Cayley, on a paper 'Researches on the theory of invariants' by William Spottiswoode | 28 June 1855 |
| RR/4/37 | Referee's report by William Spottiswoode, on a paper 'On the equation of differences for an equation of any order, and in particular for the equations of the orders two, three, four, and five' by Arthur Cayley | 25 May 1860 |
| RR/4/222 | Referee's report by William Spottiswoode, on a paper 'On the calculus of symbols - second memoir' by William Henry Leighton Russell | 7 March 1862 |
| RR/4/229 | Referee's report by William Spottiswoode, on a paper 'On quaternary cubics' by George Salmon | 20 July 1860 |
| RR/4/251 | Referee's report by Arthur Cayley, on a paper 'On internal and external division in the calculus of symbols' by William Spottiswoode | 3 April 1862 |
| RR/8/207 | Referee's report by James Clerk Maxwell, on a paper 'On the sensitive state of electrical discharges through rarefied gases' by William Spottiswoode and John Fletcher Moulton, Baron Moulton | 12 June 1879 |
| MC/16/162 | Letter from W Hugh Spottiswoode, Her Majesty's Printing Office, 6 Middle New Street, Fetter Lane, to John Evans, Treasurer of the Royal Society, Burlington House | 21 November 1894 |
| MC/16 | Volume 16 of miscellaneous correspondence regarding business matters, sent to the Royal Society | 1893-1896 |
| ACS/1/1/17 | Letter from [William George] Armstrong, Cragside, Rothbury, to [Alan Archibald Campbell] Swinton, 66 Victoria [Street], London, S.W | 13 April 1891 |
| MC/5 | Volume 5 of miscellaneous correspondence regarding business matters, sent to the Royal Society | 1851-1858 |
| ACS/1/1/377 | Letter from [Joseph Wilson] Swan, Overhill, Warlingham, Surrey, to Mr [Alan Archibald] Campbell Swinton | 11 February 1912 |
| MS/743/1/95 | Letter from William Spottiswoode, The Royal Society, Burlington House, London, to [John Hall] Gladstone | 1 November 1878 |
| ACS/1/1/378 | Letter from [Joseph Wilson] Swan, Overhill, Warlingham, Surrey, to Mr [Alan Archibald] Campbell Swinton | 15 February 1912 |