Much of the collection is made up of diaries and notebooks relating to expeditions sent to Africa by the Liverpool School of Tropical Medicine to study diseases such as malaria and trypanosomiasis. From Todd's subsequent career there is also material on journeys to Western Canada to study Swamp Fever in horses and to Poland to study Typhus, some general notes on tropical diseases, a laboratory notebook on experiments with fever ticks and a paper on the Congo Free State as a political unit. The dates covered are 1901-1920. A final block of material consists of letters and loose papers including sketches, covering 1890-1949.

Louisa Martindale collection, 1872-1964. The collection consists of Section A: a little personal correspondence, papers, articles, speeches and lectures by Louisa Martindale, and some personal material including notes on the glaucoma which eventually blinded her, 1872-1960; and Section B: papers concerning the Medical Women's International Association (founded 1919) of which Miss Martindale was President from 1937 to 1947. As well as her own correspondence in this capacity, 1937-1946, there is one file of the correspondence of Mme Montreuil-Strauss, Secretary of the Medical Women's International Association at his period. (Louisa Martindale destroyed the vast bulk of her case records at the time of her retirement from practice around 1950, those remaining were destroyed by her executors after her death).

Papers of Edward Jenner, [1798-1819], comprising draft of his paper on cow pox, [1798]; letter to his son R F Jenner, 1819; papers including fragments of his journal and verses; letters from Jenner, [1796-1823], to various correspondents including Mr E Gardner of Frampton, including account of his inoculation of James Phipps, 1796, and to John Baron; letters to Jenner, 1801-1819, including from E Gardner, Sydney Smith; letters to John Baron, 1823-1829, including from G C Jenner.

Papers of Michael Stewart Rees Hutt, 1962-1991, comprise diaries and papers relating to his work as a pathologist, largely in Uganda and notably include accounts of Uganda Safari, 1990; visit to Uganda, 1981; safari to Western Province, 1962; Uganda trip, 1967. Papers include a report on Makerere University Medical School, 1982 and a paper titled 'Geographical pathology in medical education' by Hutt and I J P A Loefler, 1969.

Papers of George Macdonald consist of a diary and photograph albums of malaria eradication work in Malaysia, Singapore and Ceylon with Sir Malcolm Watson, 1937; diaries of his work in Italy and Sicily during World War Two; photographs of malaria control measures during World War Two in the Middle East, Egypt, Algiers, Crete, Sicily, Cyprus and Greece and a personnel file relating to his appointment to the Ross Institute, his overseas visits and his death.