| Reference number | Title | Date |
| IM/002676 | Ledingham, Sir John Charles Grant | nd |
| MS/914/2/32 | Journal cutting, 'Discussion on the present position of pathology and bacteriology...', by John Charles Grant Ledingham and others | 26 September 1925 |
| NLB/36/849 | Copy letter from Archibald Geikie, to John Charles Grant Ledingham | 2 January 1908 |
| RR/42/68 | Referee's report by John Charles Grant Ledingham, on a paper 'Cellular individuality in the higher animals, with special reference to the individuality of the red blood corpuscle. (II)' by Charles Todd | September 1930 |
| RR/27/30 | Referee's report by John Charles Grant Ledingham, on a paper 'On blood-platelets: their behaviour in “vitamin A” deficiency and after “radiation,” and their relation to bacterial infections' by W Cramer, A H Drew and J C Mottram | April 1922 |
| RR/27/54 | Referee's report by John Charles Grant Ledingham, on a paper 'Further observations on a bacteriolytic element found in tissues and secretions' by Alexander Fleming and A D Allison | June 1922 |
| RR/32/16 | Referee's report by John Charles Grant Ledingham, on a paper 'Studies on the nature of the immunity reaction. Part III - The possible eugynic value of pneumococcal anitgen' by Richard R Armstrong | May 1925 |
| RR/44/6 | Referee's report by John Charles Grant Ledingham, on a paper 'Investigations on Mediterranean kala azar. Parts I - V' by Saul Adler and O Theodor | 11 May 1931 |
| RR/40/49 | Referee's report by John Charles Grant Ledingham, on an unnamed paper by Eric Ponder | May 1930 |
| RR/40/48 | Referee's report by John Charles Grant Ledingham, on a paper 'The effect of variations in the cell content of hœmolytic systems' by Eric Ponder | May 1930 |
| RR/37/134 | Referee's report by John Charles Grant Ledingham, on a paper 'Hæmolysis by brilliant-green and serum' by Eric Ponder | July 1928 |
| RR/32/11 | Referee's report by John Charles Grant Ledingham, on a paper 'Studies on the nature of the immunity reaction. Part I - An experimental study of pneumococcal immunity' by Richard R Armstrong | May 1925 |
| RR/42/7 | Referee's report by John Charles Grant Ledingham, on a paper 'The kinetics of haemolysis in amboceptor-complement systems' by Eric Ponder | June 1931 |
| RR/38/110 | Referee's report by John Charles Grant Ledingham, on a paper 'The vital staining of normal and malignant cells.-II. The staining of malignant tumours with trypan blue' by Reginald James Ludford | January 1929 |
| RR/42/8 | Second referee's report by John Charles Grant Ledingham, on a paper 'The kinetics of haemolysis in amboceptor-complement systems' by Eric Ponder | October 1931 |
| RR/32/13 | Referee's report by John Charles Grant Ledingham, on a paper 'Studies on the nature of the immunity reaction. Part II. - A comparison of the antigenic properties of sensitised and raw pneumococcal vaccines' by Richard R Armstrong | May 1925 |
| RR/44/38 | Referee's report by John Charles Grant Ledingham, on a paper 'The causative organism in infectious ectromelia' by Joseph Edwin Barnard | October 1931 |
| RR/46/56 | Second referee's report by John Charles Grant Ledingham, on a paper 'The photodynamic action of methylene blue on bacteriophage' by J R Perdrau and Charles Todd | [November 1932] |
| RR/46/57 | Referee's report by John Charles Grant Ledingham, on a paper 'The photodynamic action of methylene blue on certain viruses' by J R Perdrau and Charles Todd | [November 1932] |
| RR/48/24 | Referee's report by John Charles Grant Ledingham, on a paper 'A soluble specific substance in spirochaetes' by Edward Hindle and Philip Bruce White | [December 1933] |
| RR/47/115 | Second referee's report by John Charles Grant Ledingham, on a paper 'The morphology and cytology of bacterium malvacearum, E. F. S. Part II.—Reproduction and cell-fusion' by R H Stoughton | March 1932 |
| RR/52/9 | Referee's report by John Charles Grant Ledingham, on a paper 'Investigation on Mediterranean kala azar VIII—Further observations on Mediterranean sandflies' by Saul Adler and O Theodor | July 1934 |
| RR/47/114 | Referee's report by John Charles Grant Ledingham, on a paper 'The morphology and cytology of bacterium malvacearum, E. F. S. Part II.—Reproduction and cell-fusion' by R H Stoughton | February 1932 |
| RR/52/5 | Referee's report by John Charles Grant Ledingham, on a paper 'Investigation on Mediterranean kala azar X—A note on Trypanosoma platydactyli and Leishmania tarentolae' by Saul Adler and O Theodor | July 1934 |
| RR/49/55 | Referee's report by John Charles Grant Ledingham, on a paper 'Inflammation in caterpillars of Lepidoptera' by Gordon Roy Cameron | [December 1933] |
| RR/52/11 | Referee's report by John Charles Grant Ledingham, on a paper 'Investigations on Mediterranean kala azar VII—Further observations on canine visceral leishmaniasis' by Saul Adler and O Theodor | July 1934 |
| RR/53/24 | Referee's report by John Charles Grant Ledingham, on a paper 'On the derivation of asporogenous variants of a spore-forming organism I and II' by M I Christian | [June 1934] |
| RR/52/7 | Referee's report by John Charles Grant Ledingham, on a paper 'Investigations on Mediterranean kala azar IX—Feeding experiment with phlebotomus perniciosus and other species on animals infected with leishmania infantum' by Saul Adler and O Theodor | July 1934 |
| RR/55/25 | Referee's report by John Charles Grant Ledingham, on a paper 'The relationship between the serological reactions and the infectivity of potato virus 'X'' by Frederick Charles Bawden | June 1935 |
| RR/38/111 | Referee's report by John Charles Grant Ledingham, on a paper 'The vital staining of normal and malignant cells. I.-Vital staining with trypan blue, and the cytoplasmic inclusions of liver and kidney cells' by Reginald James Ludford | June 1928 |
| RR/54/21 | Referee's report by John Charles Grant Ledingham, on a paper 'The mechanism of the bactericidal action of radioactive radiations I & II' by D E Lea, R B Haines and Charles Alfred Coulson | December 1935 |
| RR/58/47 | Referee's report by John Charles Grant Ledingham, on a paper 'A new group of filterable organisms' by Patrick Playfair Laidlaw and William Joseph Elford | March 1936 |
| RR/63/84 | Referee's report by John Charles Grant Ledingham, on a paper 'The potato virus "X": Its strains and reactions' by Redcliffe Nathan Salaman | 17 December 1937 |
| NLB/67/544 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Professor [John Charles Grant] Ledingham, CMG, FRS | 20 January 1925 |
| NLB/65/597 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Sir John [Rose] Bradford, FRS | 26 November 1923 |
| NLB/72/394 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Professor [John Charles Grant] Ledingham, CMG, FRS | 30 September 1929 |
| NLB/68/251 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Sir John Rose Bradford, KCMG, FRS | 5 June 1925 |
| NLB/69/759 | Copy letter from [James Hopwood Jeans,] Secretary of the Royal Society; to Prof. [John Charles Grant] Ledingham, FRS | 6 October 1926 |
| NLB/68/357 | Copy letter from James Hopwood Jeans, Secretary of the Royal Society; to Sir John Rose Bradford, KCMG, FRS | 24 June 1925 |
| NLB/69/438 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Prof. [John Charles Grant] Ledingham, FRS | 14 April 1926 |
| NLB/69/922 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to the Secretary, Imperial Cancer Research Fund, 8 Queen Square, Bloombury, WC1 | 17 November 1926 |
| NLB/72/236 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Dr [John Charles Grant] Ledingham, FRS | 5 June 1929 |
| NLB/69/919 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Prof. [John Charles Grant] Ledingham, C.M.G., FRS | 17 November 1926 |
| NLB/71/656 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Prof. [John Charles Grant] Ledingham, C.M.G., FRS | 26 September 1928 |
| NLB/73/82 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Prof. [John Charles Grant] Ledingham, FRS | 22 November 1930 |
| EC/1921/15 | Ledingham, Sir John Charles Grant: certificate of election to the Royal Society | |
| RR/57/28 | Referee's report by John Charles Grant Ledingham, on a paper 'Cellular individuality in the higher animals, with special reference to the individuality of the red blood corpuscle—III' by Charles Todd | [March 1935] |
| NLB/68/84 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Sir John Rose Bradford, KCMG, FRS | 9 May 1925 |
| NLB/69/614 | Copy letter from [James Hopwood Jeans,] Secretary of the Royal Society; to Prof. [John Charles Grant] Ledingham, FRS | 24 June 1926 |
| NLB/37/100 | Copy letter from Robert William Frederick Harrison to Professor J [John] Rose Bradford, Foreign Secretary of the Royal Society | 27 January 1908 |
| RR/28/132 | Referee's report by John Charles Grant Ledingham, on a paper 'A comparison of the activities antiseptics on bacteria and on leucocytes' by Alexander Fleming | [December 1923] |
| NLB/66/419 | Copy letter from William Bate Hardy, Secretary of the Royal Society; to Prof. [John Charles Grant] Ledingham, FRS | 6 May 1924 |
| NLB/68/746 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to [William Cecil Dampier] Wetham Esq., FRS; also circulated to Sir James [Colquhoun] Irvine; Sir Thomas Lewis; Professor [John Charles Grant] Ledingham; Professor [James Peter] Hill; Professor [Edmund Johnston] Garwood; Professor [Frederick Alexander] Lindemann; [John Edensor] Littlewood Esq.; Sir [Robert] Robertson | 29 October 1925 |
| NLB/69/602 | Copy letter from [James Hopwood Jeans], Secretary of the Royal Society; to Prof. [John Charles Grant] Ledingham, FRS | 17 June 1926 |
| P/0174 | Portrait of Ledingham, Sir John Charles Grant | |
| RR/35/74 | Referee's report by John Charles Grant Ledingham, on a paper 'Immunological and serological studies on the viruses of fowl-pox and vaccinia' by G Marshall Findlay | December 1927 |
| RR/46/52 | Referee's report by John Charles Grant Ledingham, on a paper 'The relationship of micro-organisms to the decay of stone' by Sydney G Paine, Frank V Linggood, Freda Schimmer and Thomas C Thrupp | [August 1932] |
| RR/49/44 | Referee's report by John Charles Grant Ledingham, on a paper 'The antiseptic properties of further amino derivatives of styryl and anil quinoline' by Carl Hamilton Browning, Julius Berend Cohen, K E Cooper, S Ellingworth and R Gulbransen | [November 1933] |
| RR/56/4 | Referee's report by John Charles Grant Ledingham, on a paper 'On the effect of pure ozone on bacteria' by R B Haines | [March 1935] |
| RR/60/6 | Referee's report by John Charles Grant Ledingham, on a paper 'The life history of some marine plankton diatoms' by F Gross | 1936 |
| RR/43/100 | Referee's report by John Charles Grant Ledingham, on a paper 'The vital staining of normal and malignant cells. IV. - A comparison of the vital staining of the parenchyma cells of the liver with acid and basic dyes' by Reginald James Ludford | 30 March 1931 |
| RR/27/124 | Referee's report by John Charles Grant Ledingham on a paper 'The action of 'peptone' on blood and immunity thereto' by J W Pickering and J A Hewitt | November 1922 |
| RR/36/6 | Referee's report by John Charles Grant Ledingham, on a paper 'Cytological studies on the viruses of fowl-pox and vaccinia' by Reginald James Ludford | [December 1927] |
| RR/40/47 | Referee's report by John Charles Grant Ledingham, on a paper 'The use of nth order equations to describe the action of simple hoemolysins' by Eric Ponder and James Franklin Yeager | May 1930 |
| RR/51/88 | Referee's report by John Charles Grant Ledingham, on a paper 'Investigations of the mechanism of the transmission of plant viruses by insect vectors.— I' by Harold Haydon Storey | [May 1933] |
| RR/46/55 | Referee's report by John Charles Grant Ledingham, on a paper 'The photodynamic action of methylene blue on bacteriophage' by J R Perdrau and Charles Todd | [July 1932] |
| MC/38 | Volume 38 of miscellaneous correspondence regarding business matters, sent to the Royal Society | 1924 |
| MC/38/62 | Letter from [John Charles Grant] Ledingham, The Lister Institute, Chelsea Gardens, London, to [William Bate] Hardy, Secretary of the Royal Society | 3 May 1924 |