Sir John Henry Gaddum Papers The collection spans Gaddum's papers from first forays into science as a student through his last role as Director of the Institute of Animal Physiology in Babraham (1958). The papers contain working notes, lecture scripts, drafts of publications and correspondence with other leading figures in physiology, such as Ulf von Euler, Sir Henry Dale, AV Hill, Marthe Vogt, Otto Loewi and Sir Hans Krebs. Correspondence with scientists in other fields demonstrates the scope of Gaddum's interests, including exchanges with statician RA Fisher, HW Florey, WH Thorpe and JBS Haldane. Several group photographs taken at conferences feature leading physiologists of this time. A set of photos chronicles a trip to Russia taken by a group of Royal Society Fellows in 1956. Gaddum's laboratory notebooks, strategy reports and correspondence with other scientists worldwide during the 1930s-40s provide a good insight into the role of the scientist in wartime. The working papers and lab books contain much material relating to substance P, acetylcholine and techniques of bioassay. Throughout his life Gaddum maintained interest in a variety of subjects, producing a popular textbook on pharmacology and reviewing the work of other researchers. This active life, which included chairing the Committee for Clinical Endocrinology for the Medical Research Council, sitting on numerous boards and peer review committees, is reflected in the papers. 1922-1965