Joseph A Arkwright [1] 1937. Charles R Box [1] 1936. British Medical Association: Section of Microbiology: S Philips Bedson Hon Sec [1] 1922. TG Brodie [1] 1930. George H Buckmaster [1] 1917. W Bulloch [10] 1915-1937, [n.d.]. Albert Calmette [1] [+ letter from Twort to him] 1932. WJ Church [1] 1913. Capt George G and Mrs Cottle [7] 1939-1944, [n.d.]. H H Dale, Secretary, Royal Society [2] 1929. George Dean [1] 1907. Paul de Kruif [envelope only, marked 'letter missing! AT']. Paul Fildes [2], 1934, [to Mrs Twort] 1952. Alexander Fleming [1] 1922. Sir Rickman Godlee [1, and 2 from Twort to him] 1918. Alfred Pearce Gould [1 to Leonard Hill, + 1] 1913, 1914. Le Docteur Andre Gratia, wedding invitation 1926. Leonard Hill [7, + 1 from Twort to him], 1911-1919, [n.d.]. Frederick Hobday [2], 1914, 1925. FG Hopkins [1] 1923. Robert Hutchinson [1] 1907. Kazunari Ishibashi [1] 1908. JA Jennings [2] 1916. Percy Kidd [1] 1903. Sydney Holland, Viscount Knutsford [1] 1907. H Krsjel [1] 1909. JC Ledingham [2, + enclosed letter from Prof O Klotz to him] 1908, 1931. WM Llwellin [1] 1914. WB Leishmann [1] [n.d.]. Macintosh [telegram to Bulloch] 1909. Donald Macmaster [1] 1917. CJ Martin [1 + copy of his letter to Lord William Seymour] 1908. Medical Research Club: notice of meeting 1920. Medical Research Council, A Landsborough Thomson [1] 1920. Edward Mellanby [6] 1912-1933. J Mellanby [1] 1919. EA Minchin [1] 1909. GP Mudge [1] [1918]. David Nabarro [1] 1925. Neron Lamps Ltd [1, with enclosures] 1931. Pasteur Centenary [1] 1923. Karl Pearson [1] 1911. James H Sequiera [1] 1911. Lord Shaftesbury [1] 1948. J Takita [1] 1936. Miss Talbot [1 from Twort] 1900. FP Taplin [1] 1911. Truth, Collin Brooks, editor [1 to Mrs Twort] 1944. Herbert M Turnbull [1] 1930. Mrs Twort ('Mum') [1] [n.d.]. Charles C Twort (brother) [1] 1936. AE Wright [2] 1912, 1917. Unidentified correspondents [4] 1906, 1911, 1924 [n.d.].