This collection is composed primarily of Rona Hurst's 2900-page typescript, "The Evolution of Genetics." It is an unpublished history of her husband C. C. Hurst's contributions to the early development of genetics in England, and it is based on the collection of 2000 letters in the Hurst Collection at Cambridge University Library. Her history includes typescripts of many of the letters. There is also a copy of C.C. Hurst's paper on eugenics, "Genetical Improvement of the World's Populations." This note is currently under review for revision.