The papers of J.H.Hofmeyr, spanning the years 1891-950, with the preponderance between 1913 and 1948, consist of correspondence, diaries, documents, memoranda, speeches, college notes, drafts of published and unpublished writings, scrap-books, postcard albums and photographs.

They are an invaluable source of primary material for the historian researching the political history of South Africa between the two world wars and during the second world war. The correspondence consists mainly of letters to Hofmeyr, although there are some originals and copies of letters written by him, and it is primarily in English with a few in Afrikaans. His correspondents include such politicians as L.Botha, J.B.M.Hertzog, D.F.Malan, F.S.Malan and J.C.Smuts. There is much on the history of the formation of the United Party, its activities from 19341948 and the growth of the National Party.