Letters and papers of C.C. Hurst, with annotations made by his wife Rona, who also compiled lists of files and summaries of the correspondence (section A), and used Hurst's letters to write a book, The Evolution of Genetics (section 23).

Includes correspondence, field notebooks, material relating to Bateson's career, lecture notes, material relating to the University of Cambridge, papers documenting various scientific debates, draft publications, lectures, material relating to societies and organisations and photographs.