A. Biographical and Personal, 1875-1967: obituaries; memoirs of Stiles; family papers; personal souvenirs including school certificates, invitations, correspondence; photographs of family and colleagues; letters of congratulation on Stiles' election to the Royal Society; papers relating to a visit made by Stiles to Czechoslovakia in 1958; account books; royalty statements; articles.
B. Notes and Working Papers, 1906-1909: Notes on lectures at Cambridge delivered by Professor H. Marshall Ward and Sir Rowland Biffen.
C. Publications and Addresses, 1911-1963: Speech drafts; reviews; typescript drafts of some of Stiles' early papers; published works.
D. Correspondence: Relating to the Natural Sciences Tripos, Cambridge, 1925-1926 (Stiles was examiner in Botany, 1926 and 1927); Final Honour School of Natural Science, Oxford, 1927 (Stiles was External Examiner); with I.B. Pole Evans, South Africa Department of Agriculture, suggesting a visit from Stiles (the visit did not take place); with the Royal Society; other correspondence, 1948-1961.