This large and comprehensive collection covers almost all aspects of Frank's professional career. His research is documented from the early 1930s and the material covers a wide range of his scientific interests, including dielectric loss, crystal dislocations, properties of polymers, liquid crystals and geophysics. Wartime research is also represented, particularly work on rockets. There are notes, drafts, and correspondence relating to Frank's published work, 1935-1988, records of visits and conferences, 1939-1987, and the Bristol Physics Department, 1946-1986. A particular feature of the collection is its documentation of Frank's association with a large number of British, overseas, and international organizations, including the Faraday Society, the Institute of Physics, the International Organization of Crystal Growth, the Pugwash movement, the Royal Society and the Science Research Council. Also represented are a number of local Bristol institutions, including Badminton School, the Bristol Municipal Charities, and Queen Elizabeth's Hospital school. There is considerable material relating to Frank's work for commercial organizations. The best documented is Frank's extensive work for De Beers, for whom he served on the Diamond Research Committee which oversaw De Beers-funded research in UK universities and which organized the Diamond Research Conferences. There are also records of consultancy work for British Rail, General Electric, and IBM. Finally, there is a substantial scientific correspondence with friends, colleagues and former students, including N. Cabrera, J. D. Eshelby, R. V. Jones and F. R. N. Nabarro.