Includes: correspondence, diaries, and notebooks relating to his personal and organizational life, 1913-1963; notes and manuscripts of his autobiography, entitled On the Growth of My Life, 1953-1959; family correspondence and genealogy notes, 1928-1964; poetry notebooks and manuscripts, 1913-1952; classics, philosophy and religion notebooks; philosophy of science notebooks and essay manuscripts, 1905-1943; mathematics notebooks, 1909-1964, on differential and difference equations, number theory, boundary problems and value and finite group theory, with notations, manuscript drafts, lectures, computations, bibliographic citations and reading records; theory of relativity notebook; bibliographic notecards and manuscripts; reprints, 1906-1953, and essays, speeches and addresses on education, philosophy of sciences and a philosophy of life. Correspondence, clippings, reading records and indexes. Also includes notes and clippings relating to dissertation research carried on under Carmichael; the Chicago Section of the American Mathematical Society, 1920-1921; the Illinois Chapter of the American Association of University Professors, 1929; Eunice Carmichael Roberts, 1939-1959; family meetings, 1954-1956; publishers; the University of Illinois Philosophy Club, 1923; Faculty Forum; Indiana Debate on Relativity, 1926; Woodrow Wilson, 1913-1916; the family farm and Mathematics Department and Graduate College, 1919-1947. Correspondents include Oliver Carmichael.