| Reference number | Title | Date |
| MM/10/95 | Letter from Edward Frankland, The Yews, Reigate, to HE Armstrong | 30 January 1887 |
| IM/Maull/003478 | Pedler, Sir Alexander | nd |
| NLB/7/31 | Copy letter from Herbert Rix, to Professor Alexander Pedler, Fellow of the Royal Society | 14 November 1892 |
| NLB/11/784 | Copy letter from an unknown correspondent, to Messrs Harrison & Sons | 4 October 1895 |
| NLB/9/943 | Copy letter from Herbert Rix, to Professor Alexander Pedler, Fellow of the Royal Society | 31 July 1894 |
| NLB/9/944 | Copy letter from Herbert Rix, to Messrs Clay & Sons, Ave Maria Lane, E.C. | 31 July 1894 |
| RR/15/85 | Second referee's report by William de Wiveleslie Abney, on a paper 'Total eclipse of the sun, January 22, 1898, observations at Visiadrug' by Joseph Norman Lockyer, Captain Chisholm-Batten and Alexander Pedler | February 1901 |
| RR/15/84 | Second referee's report by Arthur Schuster, on a paper 'Total eclipse of the sun, January 22, 1898, observations at Visiadrug' by Joseph Norman Lockyer, Captain Chisholm-Batten and Alexander Pedler | 1 July 1900 |
| NLB/16/57 | Copy letter from Robert William Frederick Harrison, to W T Thiselton-Dyer, Fellow of the Royal Society | 21 January 1898 |
| NLB/32/143 | Copy letter from Robert William Frederick Harrison, to [Messrs Harrison & Sons] | 15 January 1906 |
| NLB/19/742 | Copy letter from Theodore E James, to Messrs Harrison & Sons | [11 December 1899] |
| NLB/23/2/53 | Copy letter from Sir Michael Foster, to Sir [Joseph] Norman Lockyer, Fellow of the Royal Society, Captain A W Chisholm-Batten and Professor [Alexander] Pedler, Fellow of the Royal Society | 26 March 1901 |
| NLB/36/249 | Copy letter from Robert William Frederick Harrison, to Sir Alexander Pedler, Fellow of the Royal Society | 2 October 1907 |
| NLB/37/123 | Copy letter from Robert William Frederick Harrison to Sir Alexander Pedler CIE, FRS | 29 January 1908 |
| NLB/38/97 | Copy letter from Robert William Frederick Harrison, to Sir Alexander Pedler, Fellow of the Royal Society | 15 June 1908 |
| NLB/51/739 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society to Messrs Harrison and Sons | 14 June 1915 |
| NLB/54/183 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Sir Alexander Pedler, FRS | 26 February 1917 |
| AP/60/5 | Unpublished appendix, 'On cobra poison' by Alexander Pedler | 1877 |
| RR/15/86 | Third referee's report by Arthur Schuster, on a paper 'Total eclipse of the sun, January 22, 1898, observations at Visiadrug' by Joseph Norman Lockyer, Captain Chisholm-Batten and Alexander Pedler | February 1901 |
| NLB/55/528 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to unknown correspondent | 15 May 1918 |
| NLB/55/530 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Sir William [Augustus] Tilden, FRS | 17 May 1918 |
| NLB/66/230 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Messrs. Few & Co. 12 Surrey Street, Strand, W.C.2 | 20 March 1924 |
| EC/1892/21 | Pedler, Sir Alexander: certificate of election to the Royal Society | |
| RR/15/80 | Referee's report by William de Wiveleslie Abney, on a paper 'Total eclipse of the sun, January 22, 1898, observations at Visiadrug' by Joseph Norman Lockyer, Captain Chisholm-Batten and Alexander Pedler | February 1900 |
| NLB/55/577 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to William Foster Esq., C.I.E., Registar & Superintendent of Records, India Office | 17 June 1918 |
| NLB/68/759 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to the Secretary of the British Science Guild; 6 John Street, Adelphi, W.C.2. | 30 October 1925 |
| NLB/71/733 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to the Editor, the Encyclopaedia Britannica, 80 Regents Street, W1 | 17 October 1928 |
| P/0100 | Pedler, Sir Alexander | 1917 |
| RR/15/83 | Letter from Joseph Norman Lockyer, on his paper with Captain Chisolm-Batten and Alexander Pedler 'Total eclipse of the sun, January 22, 1898, observations at Visiadrug' to Arthur William Rucker | 26 March 1900 |
| RR/15/82 | Copy letter from Arthur William Rucker, on a paper 'Total eclipse of the sun, January 22, 1898, observations at Visiadrug' by Joseph Norman Lockyer, Captain Chisholm-Batten and Alexander Pedler to Joseph Norman Lockyer | 23 March 1900 |
| RR/15/81 | Referee's report by Arthur Schuster, on a paper 'Total eclipse of the sun, January 22, 1898, observations at Visiadrug' by Joseph Norman Lockyer, Captain Chisholm-Batten and Alexander Pedler | March 1900 |
| MC/15/292 | Letter from Alexander Pedler, Professor of Chemistry, Presidency College and Meteorological Reporter, to the Government of Bengal to Professor Michael Foster, Secretary of the Royal Society | 1 July 1892 |
| MC/23/339 | Letter from [Alexander] Pedler, British Science Section, 28 Stanhope Gardens, Queen's Gate, to Mr [Robert] Harrison, [Royal Society] | 1908 |
| MC/23/338 | Letter from [Alexander] Pedler, British Science Guild, 28 Stanhope Gardens, Queen's Gate, London, to Mr [Robert] Harrison, [Royal Society] | 10 April 1908 |
| MC/22/35 | Letter from [Alexander] Pedler, Secretary of the British Science Guild, to [Robert William Frederick] Harrison | 15 February 1907 |
| MC/22/34 | Letter from [Alexander] Pedler, Secretary of the British Science Guild, to [Robert William Frederick] Harrison | 12 February 1907 |
| MC/22/36 | Letter from [Alexander] Pedler, Secretary of the British Science Guild, to the Honorary Secretary of the Royal Society | 15 February 1907 |
| MC/22/37 | Letter from [Alexander] Pedler, British Science Guild, to the Secretary of the Royal Society | 22 July 1907 |
| MC/22/82 | Letter from [Alexander] Pedler, Franco-British Exhibition of Science, Arts, and Industries, London 1908, 56 Victoria Street, to the Secretary of the Royal Society, Burlington House | 2 January 1907 |
| MC/22 | Volume 22 of miscellaneous correspondence regarding business matters, sent to the Royal Society | 1907 |