| RefNo | Title | Date |
| EC/1895/10 | Heycock, Charles Thomas: certificate of election to the Royal Society | |
| NLB/18/740 | Copy letter from Robert William Frederick Harrison, to C Heycock, Fellow of the Royal Society | 2 May 1899 |
| NLB/73/354 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Sir William [Jackson] Pope, K.B.E., FRS | 19 June 1931 |
| NLB/35/228 | Copy letter from Joseph Larmor, to Charles Thomas Heycock, Fellow of the Royal Society | 2 May 1907 |
| NLB/20/267 | Copy letter from Robert William Frederick Harrison, to Charles Thomas Heycock, Fellow of the Royal Society | 9 March 1900 |
| NLB/14/338 | Copy letter from an unknown correspondent, to Messrs Harrison & Sons | 20 February 1897 |
| NLB/13/340 | Copy letter from Robert William Frederick Harrison, to Richard Tetley Glazebrook, Fellow of the Royal Society | 28 July 1896 |
| NLB/13/359 | Copy letter from Robert William Frederick Harrison, to Lord Rayleigh [John William Strutt], Secretary, Royal Society | 31 July 1896 |
| NLB/12/859 | Copy letter from Robert William Frederick Harrison, to Charles Thomas Heycock, Fellow of the Royal Society, 24 Fitzwilliam Street, Cambridge | 21 May 1896 |
| NLB/14/276 | Copy letter from Robert William Frederick Harrison, to Charles Thomas Heycock, Fellow of the Royal Society | 8 February 1897 |
| NLB/17/484 | Copy letter from Arthur William Rucker, to Richard Tetley Glazebrook, [Fellow of the Royal Society] | 24[?] October 1898 |
| NLB/20/39 | Copy letter from an unknown correspondent, to Charles Thomas Heycock, and F H Neville, Fellows of the Royal Society | 19 January 1900 |
| NLB/20/116 | Copy letter from Robert William Frederick Harrison, to Charles Thomas Heycock, Fellow of the Royal Society | 6 February 1900 |
| NLB/20/300 | Copy letter from Robert William Frederick Harrison, to Charles Thomas Heycock, Fellow of the Royal Society | 15 March 1900 |
| NLB/19/801 | Copy letter from Robert William Frederick Harrison, to Charles Thomas Heycock, Fellow of the Royal Society | 22 December 1899 |
| NLB/22/116 | Copy letter from Robert William Frederick Harrison, to [Charles Thomas] Heycock, Fellow of the Royal Society | 6 March 1901 |
| NLB/22/9 | Copy letter from Robert William Frederick Harrison, to [Charles Thomas] Heycock, Fellow of the Royal Society | 11 February 1901 |
| NLB/21/646 | Copy letter from Robert William Frederick Harrison, to Charles Thomas Heycock | 2 January 1901 |
| NLB/21/644 | Copy letter from Charles Thomas Heycock, to the Netherlands Minister | 2 January 1901 |
| NLB/23/2/284 | Copy letter from Joseph Larmor, to Charles Thomas Heycock, Fellow of the Royal Society | 23 January 1903 |
| NLB/23/1/512 | Copy letter from Robert William Frederick Harrison, to Charles Thomas Heycock, Fellow of the Royal Society | 25 November 1901 |
| NLB/26/779 | Copy letter from Joseph Larmor to, Charles Thomas Heycock, Fellow of the Royal Society, and Francis Henry Neville, Fellow of the Royal Society | 29 May 1903 |
| NLB/35/28 | Copy letter from Robert William Frederick Harrison, to Percy Carlyle Gilchrist, Fellow of the Royal Society | 5 April 1907 |
| NLB/38/594 | Copy letter from Robert William Frederick Harrison, to Charles Thomas Heycock, Fellow of the Royal Society | 7 October 1908 |
| NLB/35/763 | Copy letter from Robert William Frederick Harrison, to Messrs Harrison & Sons | 15 July 1907 |
| NLB/38/482 | Copy letter from Robert William Frederick Harrison, to Charles Thomas Heycock, Fellow of the Royal Society | 10 August 1908 |
| NLB/41/318 | Copy letter from Robert William Frederick Harrison, to Charles Thomas Heycock, Fellow of the Royal Society | 20 November 1909 |
| NLB/44/21 | Copy letter from Robert William Frederick Harrison to C [Charles] T [Thomas] Heycock FRS | 25 April 1911 |
| NLB/47/557 | Copy letter from Robert William Frederick Harrison to C [Charles] T [Thomas] Heycock FRS | 22 February 1913 |
| NLB/43/705 | Copy letter from Robert William Frederick Harrison, to Charles Thomas Heycock, Fellow of the Royal Society | 15 March 1911 |
| NLB/46/797 | Copy letter from Robert William Frederick Harrison, to Charles Thomas Heycock, Fellow of the Royal Society | 6 November 1912 |
| NLB/47/568 | Copy letter from Robert William Frederick Harrison to C [Charles] T [Thomas] Heycock FRS | 25 February 1913 |
| NLB/63/323 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to [Charles Thomas] Heycock, FRS | date illegible |
| RR/17/407 | Referee's report by Charles Thomas Heycock, on a paper 'An approximate determination of the boiling points of metals' by H C Greenwood | May 1909 |
| NLB/60/699 | Copy letter from James Hopwood Jeans, Secretary of the Royal Society; to Charles [Thomas] Heycock Esquire, Chairman of the Chemistry Committee and FRS | 17 March 1921 |
| RR/13/92 | Referee's report by Charles Thomas Heycock, on a paper 'On the structure of metals, its origin and changes' by M F Osmond and William Chandler Roberts-Austen | 22 June 1896 |
| NLB/63/543 | Copy letter from James Hopwood Jeans, Secretary of the Royal Society and FRS; to [Charles Thomas] Heycock, FRS | 03 November 1922 |
| NLB/60/75 | Copy letter from Edwin Deller, Assistant Secretary of the Royal Society; to [Charles Thomas] Heycock Esquire, Chairman of the Chemistry Committee and FRS | 8 December 1920 |
| RR/13/45 | Letter from Charles Thomas Heycock and Francis Henry Neville, on their paper 'Complete freezing-point curves of binary alloys containing silver or copper, together with another metal' to the Secretary of the Royal Society | 25 September 1896 |
| NLB/60/643 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to [Charles Thomas] Heycock Esquire, FRS | 8 March 1921 |
| NLB/59/704 | Copy letter from James Hopwood Jeans, Secretary of the Royal Society; to [Charles Thomas] Heycock Esquire, FRS | 4 November 1920 |
| NLB/60/472 | Copy letter from William Bate Hardy, Secretary of the Royal Society; to [Charles Thomas] Heycock Esquire, Chairman of the Chemistry Committee and FRS | 11 February 1921 |
| NLB/60/5 | Copy letter from James Hopwood Jeans, Secretary of the Royal Society; to Charles [Thomas] Heycock Esquire, Chairman of the Chemistry Committee and FRS | 2 December 1920 |
| RR/18/179 | Referee's report by Charles Thomas Heycock, on a paper 'The constitution of the alloys of aluminium and zinc' by Walter Rosenhain and Sydney L Archbutt | May 1911 |
| NLB/60/303 | Copy letter from James Hopwood Jeans, Secretary of the Royal Society; to [Charles Thomas] Heycock Esquire, Chairman of the Chemistry Committee and FRS | 13 January 1921 |
| NLB/64/65 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to [Charles Thomas] Heycock Esquire, Chairman of the Chemistry Committee and FRS | 26 January 1923 |
| RR/20/153 | Referee's report by Charles Thomas Heycock, on a paper 'A method of avoiding inaccuracy due to weight errors in fixing a gold coinage standard trial plate' by O Watkins | 17 February 1914 |
| NLB/60/349 | Copy letter from James Hopwood Jeans, Secretary of the Royal Society; to [Charles Thomas] Heycock Esquire, Chairman of the Chemistry Committee and FRS | 21 January 1921 |
| NLB/66/819 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to [Charles Thomas] Heycock, FRS | 18 July 1924 |
| NLB/60/565 | Copy letter from James Hopwood Jeans, Secretary of the Royal Society; to [Charles Thomas] Heycock Esquire, Chairman of the Chemistry Committee and FRS | 24 February 1921 |
| NLB/60/507 | Copy letter from William Bate Hardy, Secretary of the Royal Society; to [Charles Thomas] Heycock Esquire, Chairman of the Chemistry Committee and FRS | 17 February 1921 |
| NLB/67/422 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Professor F. C. Thompson; The University, Manchester | 18 December 1924 |
| NLB/60/763 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to [Charles Thomas] Heycock, Chairman of the Chemistry Committee and FRS | 4 April 1921 |
| NLB/60/464 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to [Charles Thomas] Heycock Esquire, Chairman of the Chemistry Committee and FRS | 10 February 1921 |
| NLB/60/780 | Copy letter from James Hopwood Jeans, Secretary of the Royal Society; to Charles [Thomas] Heycock Esquire, Chairman of the Chemistry Committee and FRS | 5 April 1921 |
| NLB/60/911 | Copy letter from James Hopwood Jeans, Secretary of the Royal Society; to [Charles Thomas] Heycock, Chairman of the Chemistry Committee and FRS | 26 April 1921 |
| NLB/61/205 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to [Charles Thomas] Heycock Esquire, Chairman of the Chemistry Committee and FRS | 1 June 1921 |
| NLB/61/114 | Copy letter from James Hopwood Jeans, Secretary of the Royal Society; to [Charles Thomas] Heycock Esquire, Chairman of the Chemistry Committee and FRS | 12 May 1921 |
| NLB/57/278 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to CT [Charles Thomas] Heycock Esq, FRS | 3 October 1919 |
| NLB/57/542 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to the Secretary of the Board of Education | 1 December 1919 |
| NLB/61/346 | Copy letter from James Hopwood Jeans, Secretary of the Royal Society; to [Charles Thomas] Heycock Esquire, Chairman of the Chemistry Committee and FRS | 21 June 1921 |
| NLB/61/417 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to [Charles Thomas] Heycock Esquire, Chairman of the Chemistry Committee and FRS | 4 July 1921 |
| NLB/57/460 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to CT [Charles Thomas] Heycock Esq, FRS | 11 November 1919 |
| NLB/57/534 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to CT [Charles Thomas] Heycock, FRS | 27 November 1919 |
| NLB/61/617 | Copy letter from James Hopwood Jeans, Secretary of the Royal Society; to [Charles Thomas] Heycock Esquire, Chairman of the Chemistry Committee and FRS | 23 September 1921 |
| NLB/61/277 | Copy letter from James Hopwood Jeans, Secretary of the Royal Society; to [Charles Thomas] Heycock Esquire, Chairman of the Chemistry Committee and FRS | 16 June 1921 |
| NLB/61/851 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to [Charles Thomas] Heycock Esquire, Chairman of the Chemistry Committee and FRS | 4 November 1921 |
| NLB/61/667 | Copy letter from James Hopwood Jeans, Secretary of the Royal Society; to [Charles Thomas] Heycock Esquire, Chairman of the Chemistry Committee and FRS | 4 October 1921 |
| NLB/62/49 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to [Charles Thomas] Heycock, Chairman of the Chemistry Committee and FRS | 23 November 1921 |
| NLB/62/379 | Copy letter from James Hopwood Jeans, Secretary of the Royal Society; to [Charles Thomas] Heycock Esquire, Chairman of the Chemistry Committee and FRS | 2 February 1922 |
| NLB/62/287 | Copy letter from James Hopwood Jeans, Secretary of the Royal Society; to [Charles Thomas] Heycock Esquire, Chairman of the Chemistry Committee and FRS | 19 January 1922 |
| NLB/62/540 | Copy letter from James Hopwood Jeans, Secretary of the Royal Society; to [Charles Thomas] Heycock Esquire, Chairman of the Chemistry Committee and FRS | 3 March 1922 |
| NLB/63/301 | Copy letter from James Hopwood Jeans, Secretary of the Royal Society and FRS; to [CharlesThomas] Heycock Esq., FRS | 10 August 1922 |
| NLB/63/24 | Copy letter from James Hopwood Jeans, Secretary of the Royal Society and FRS; to [Charles Thomas] Heycock Esq., FRS | 15 June 1922 |
| NLB/63/479 | Copy letter from James Hopwood Jeans, Secretary of the Royal Society and FRS; to [Charles Thomas] Heycock Esq., FRS | 26 October 1922 |
| NLB/62/551 | Copy letter from [Charles Thomas] Heycock, Chairman of the Chemistry Committee and FRS; to Professor [Jocelyn Field] Thorpe, FRS | 8 March 1922 |
| NLB/62/773 | Copy letter from James Hopwood Jeans, Secretary of the Royal Society; to [Charles Thomas] Heycock Esquire, Chairman of the Chemistry Committee and FRS | 4 May 1922 |
| NLB/63/622 | Copy letter from James Hopwood Jeans, Secretary of the Royal Society and FRS; to [Charles Thomas] Heycock Esq, FRS | 16 November 1922 |
| NLB/63/450 | Copy letter from James Hopwood Jeans, Secretary of the Royal Society and FRS; to [Charles Thomas] Heycock, FRS | 17 October 1922 |
| NLB/64/442 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to [Charles Thomas] Heycock Esquire, Chairman of the Chemistry Committee and FRS | 12 April 1923 |
| NLB/64/150 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to [Charles Thomas] Heycock, Chairman of the Chemistry Committee and FRS | 9 February 1923 |
| NLB/62/894 | Copy letter from James Hopwood Jeans, Secretary of the Royal Society; to [Charles Thomas] Heycock, Chairman of the Chemistry Committee and FRS | 29 May 1922 |
| NLB/64/432 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to [Charles Thomas] Heycock Esquire, Chairman of the Chemistry Committee and FRS | 11 April 1923 |
| NLB/62 | New Letter Book volume 62, copy letters sent from Royal Society administration | 11 November 1921-10 June 1922 |
| NLB/64/149 | Copy letter from James Hopwood Jeans, Secretary of the Royal Society; [John William] Nicholson, FRS | 8 February 1923 |
| NLB/64/359 | Copy letter from James Hopwood Jeans, Secretary of the Royal Society; to [Charles Thomas] Heycock Esquire, Chairman of the Chemistry Committee and FRS | 22 March 1923 |
| NLB/63/406 | Copy letter from unknown correspondent; to [Charles Thomas] Heycock Esq., FRS | 09 October 1922 |
| NLB/63/643 | Copy letter from James Hopwood Jeans, Secretary of the Royal Society and FRS; to [Charles Thomas] Heycock Esq., FRS | 23 November 1922 |
| NLB/63/807 | Copy letter from James Hopwood Jeans, Secretary of the Royal Society and FRS; to [Charles Thomas] Heycock Esq., FRS | 22 December 1922 |
| NLB/65/32 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to [Charles Thomas] Heycock Esq., FRS | 16 July 1923 |
| NLB/64/540 | Copy letter from James Hopwood Jeans, Secretary of the Royal Society; to [Charles Thomas] Heycock, FRS | 03 May 1923 |
| NLB/64/612 | Copy letter from James Hopwood Jeans, Secretary of the Royal Society; to [Charles Thomas] Heycock Esq., FRS | 11 May 1923 |
| NLB/65/600 | Copy letter from James Hopwood Jeans, Secretary of the Royal Society; to [Charles Thomas] Heycock Esq., FRS | 27 November 1923 |
| NLB/64/554 | Copy letter from James Hopwood Jeans, Secretary of the Royal Society; to [Charles Thomas] Heycock, FRS | 03 May 1923 |
| NLB/64/826 | Copy letter from James Hopwood Jeans, Secretary of the Royal Society; to [Charles Thomas] Heycock Esq. FRS | 26 June 1923 |
| NLB/65/765 | Copy letter from James Hopwood Jeans, Secretary of the Royal Society; to [Charles Thomas] Heycock, FRS | 21 December 1923 |
| NLB/64/837 | Copy letter from James Hopwood Jeans, Secretary of the Royal Society; to [Charles Thomas] Heycock, FRS | 27 June 1923 |
| NLB/65/44 | Copy letter from James Hopwood Jeans, Secretary of the Royal Society; to [Charles Thomas] Heycock Esq., FRS | 17 July 1923 |
| NLB/64/628 | Copy letter from James Hopwood Jeans, Secretary of the Royal Society; to [Charles Thomas] Heycock Esq. FRS | 16 May 1923 |
| NLB/65/498 | Copy letter from James Hopwood Jeans, Secretary of the Royal Society; to Sir Dugald Clerk, FRS | 8 November 1923 |
| NLB/65/349 | Copy letter from James Hopwood Jeans, Secretary of the Royal Society; to Sydney Pitt Esq.; [Clerk to] The Armourers and Brasiers Company, 81 Coleman Street, E.C. | 18 October 1923 |
| NLB/65/842 | Copy letter from James Hopwood Jeans, Secretary of the Royal Society; to [Charles Thomas] Heycock Esq., FRS | 17 January 1924 |
| NLB/65/679 | Copy letter from James Hopwood Jeans, Secretary of the Royal Society; to [Charles Thomas] Heycock, FRS | 6 December 1923 |
| NLB/65/495 | Copy letter from James Hopwood Jeans, Secretary of the Royal Society; to Dr Alexander Scott, FRS | 8 November 1923 |
| NLB/65/132 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to [Charles Thomas] Heycock Esq., FRS | 8 August 1923 |
| NLB/65/885 | Copy letter from James Hopwood Jeans, Secretary of the Royal Society; to [Charles Thomas] Heycock Esq., FRS | 24 January 1924 |
| NLB/65/663 | Copy letter from James Hopwood Jeans, Secretary of the Royal Society; to Sir Geoge [Thomas] Beilby, FRS | 5 December 1923 |
| NLB/66/746 | Copy letter from James Hopwood Jeans, Secretary of the Royal Society; to Charles Thomas Heycock, FRS | 3 July 1924 |
| NLB/65/579 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to the Members of the Armourers and Brasiers' Company Research Fellowship Committee (Sir [George Thomas] Beilby, Professor [Henry Cort Harold] Carpenter, Dr [Charles Thomas] Heycock, Dr [Walter] Rosenhain, Dr G. N. Pitt, Mr M. H. Young, Mr [Sydney] Pitt) | 23 November 1923 |
| NLB/66/576 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to [Charles Thomas] Heycock, FRS | 30 May 1924 |
| NLB/66/607 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to [Charles Thomas] Heycock Esq., FRS | 5 June 1924 |
| NLB/66/715 | Copy letter from James Hopwood Jeans, Secretary of the Royal Society; to [Charles Thomas] Heycock Esq., FRS | 25 June 1924 |
| RR/14/184 | Referee's report by William Chandler Roberts-Austen, on a paper 'Gold-aluminium alloys' by Charles Thomas Heycock and Francis Henry Neville | nd [November 1899] |
| NLB/72/150 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to [Charles Thomas] Heycock Esq., FRS | 23 April 1929 |
| NLB/72/80 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to [Charles Thomas] Heycock Esq., FRS | 22 February 1929 |
| NLB/64/730 | Copy letter from James Hopwood Jeans, Secretary of the Royal Society; to [Charles Thomas] Heycock FRS | 11 June 1923 |
| NLB/13/588 | Copy letter from Robert William Frederick Harrison, to Mr Collings | 12 October 1896 |
| NLB/13/573 | Copy letter from Robert William Frederick Harrison, to Charles Thomas Heycock, Fellow of the Royal Society | 8 October 1896 |
| NLB/13/241 | Copy letter from Robert William Frederick Harrison, to Richard Tetley Glazebrook, Fellow of the Royal Society | 8 July 1896 |
| RR/16/68 | Referee's report by James Alfred Ewing, on the Bakerian Lecture 'The constitution of the Copper-Tin series of alloys' by Charles Thomas Heycock and Francis Henry Neville | April 1903 |
| NLB/20/334 | Copy letter from Arthur William Rucker, to Professor George Carey Foster, Fellow of the Royal Society | 26 March 1900 |
| NLB/35/280 | Copy letter from Robert William Frederick Harrison, to Professor Arthur Schuster, Fellow of the Royal Society, Chairman of the Physics and Chemistry Committee | 10 May 1907 |
| NLB/61/57 | Copy letter from James Hopwood Jeans, Secretary of the Royal Society; to [Charles Thomas] Heycock Esquire, Chairman of the Chemistry Committee and FRS | 3 May 1921 |
| NLB/62/142 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to [Charles Thomas] Heycock, Chairman of the Chemistry Committee and FRS | 9 December 1921 |
| NLB/62/400 | Copy letter from James Hopwood Jeans, Secretary of the Royal Society; to [Charles Thomas] Heycock Esquire, Chairman of the Chemistry Committee and FRS | 9 February 1922 |
| NLB/72/285 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to H. Pitt Esq | 18 June 1929 |
| NLB/60/850 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to [Charles Thomas] Heycock Esquire, Chairman of the Chemistry Committee and FRS | 15 April 1921 |
| NLB/60 | New Letter Book volume 60, copy letters sent from Royal Society administration | 2 December 1920-26 April 1921 |
| NLB/61/904 | Copy letter from James Hopwood Jeans, Secretary of the Royal Society; to [Charles Thomas] Heycock Esquire, Chairman of the Chemistry Committee and FRS | 10 November 1921 |
| NLB/61 | New Letter Book volume 61, copy letters sent from Royal Society administration | 26 April 1921-11 November 1921 |
| RR/17/184 | Referee's report by Charles Thomas Heycock, on a paper 'Electric furnace reactions under high gaseous pressures' by R S Hutton and Joseph Ernest Petavel | [May 1907] |
| NLB/64 | New Letter Book volume 64, copy letters sent from Royal Society administration | 19 January 1923-11 July 1923 |
| NLB/57 | New Letter Book volume 57, copy letters sent from Royal Society administration | 27 June 1919-27 February 1920 |
| RR/14/185 | Referee's report by Ernest Howard Griffiths, on a paper 'Gold-aluminium alloys' by Charles Thomas Heycock and Francis Henry Neville | nd [November 1899] |
| RR/15/4 | Referee's report by Charles Thomas Heycock, on a paper 'The thermo-chemistry of the alloys of copper and zinc' by T J Baker, | January 1901 |
| RR/16/67 | Referee's report by Alexander Scott, on the Bakerian Lecture 'The constitution of the Copper-Tin series of alloys' by Charles Thomas Heycock and Francis Henry Neville | nd [c March 1903] |
| RR/13/42 | Referee's report by George Carey Foster, on a paper 'Complete freezing-point curves of binary alloys containing silver or copper, together with another metal' by Charles Thomas Heycock and Francis Henry Neville | 8 July 1896 |
| RR/13/43 | Referee's report by Percival Spencer Umfreville Pickering, on a paper 'Complete freezing-point curves of binary alloys containing silver or copper, together with another metal' by Charles Thomas Heycock and Francis Henry Neville | July 1896 |
| RR/13/44 | Letter from Charles Thomas Heycock, on his paper 'Complete freezing-point curves of binary alloys containing silver or copper, together with another metal' with Francis Henry Neville to the Secretary of the Royal Society | 25 September 1896 |
| NLB/38/540 | Copy letter from Robert William Frederick Harrison, to Charles Thomas Heycock, Fellow of the Royal Society | 16 September 1908 |
| MC/23/321 | Letter from [Francis Henry] Neville, Sidney Sussex College, Cambridge, to the [Royal Society] | 1 June 1908 |
| MC/23/214 | Letter from Charles [Thomas] Haycock, 3 St. Peter's Terrace, Cambridge, to Mr [Robert] Harrison, [Royal Society] | 15 August 1908 |
| MC/27/144 | Letter from [Gilbert Henry] Gulliver, University of Edinburgh, to The Secretary, Royal Society of London | 16 January 1912 |
| MC/29/61 | Letter from William [George] Fearnsides, 10 Silver Birch Avenue, Fulwood, Sheffield, to The Secretaries of The Royal Society | 7 March 1914 |
| MC/22/113 | Letter from Charles Thomas Heycock, 3 St. Peter's Terrace, Cambridge, to the Secretaries of the Royal Society | 25 October 1907 |
| MC/22 | Volume 22 of miscellaneous correspondence regarding business matters, sent to the Royal Society | 1907 |