Papers of Henry Solomon Wellcome, 1800-1985, comprising articles, publications, financial records, legal records, administrative documents, property details, probate records, marriage and divorce records, diaries, microfiche of letter books, details of events, subscription lists, field and geological reports, press cuttings, photographs, ephemera, objects, and family papers dating back to 1800.

The vast majority of the material relates to Dent's research and clinical interests and falls into four main categories: correspondence files; files created around the publication of papers; lecture notes and symposium papers; and case/research notes. There are also smaller quantities dealing with other aspects of his career, such as the administration of UCH Metabolic Ward. The papers thus reflect most of Dent's scientific and clinical interests. This research is mainly represented by the abstracted documentation which he kept with drafts of his published papers (see section E.1) and also by correspondence about cases and clinical case notes (see section C.5). To a lesser degree they also illustrate the work at the laboratory bench which underpinned much of this research. For example, a file of unidentified paper chromatograms has been preserved (C.2/10) to illustrate one of Dent's methods of working, as described by his colleague, Heathcote, and quoted in the Biographical Memoirs of Fellows of the Royal Society, 1978: 'Paper chromatograms were not to be thrown away. They were filed and, since the colours faded, the outline of each spot was drawn in and the intensity of the colour was indicated by a number.' The way in which Dent compiled a large series of files around drafts of scientific papers also illustrates the importance of the published paper to him as a stage in the research process. An incomplete collection of reprints of Dent's published papers may be found in section E.2 of the collection.

Correspondence, diaries and other papers of Sir Alfred Charles Glyn Egerton, including some personal papers but largely relating to The Royal Society and particularly to wartime activities and post-war research needs in Britain. The diaries form an almost complete record of Egerton's career during the period 1943-1959. Earlier diaries date back to 1917 and the period 1929-1930, but for the most part they relate to the period 1938-1941.