The Sinclair mss. VI, 1907-1977, consists of correspondence, writings, and miscellaneous papers by and relating to author Upton Beall Sinclair, 1878-1968, his wife Mary Craig (Kimbrough) Sinclair, 1882-1961, and his son David Sinclair, 1901-1987.
The Lockhart, R. mss., 1906-1969, consist of the correspondence, writings and memorabilia of Sir Robert Hamilton Bruce Lockhart, 1887-1970, diplomat and writer.
The Lockhart, R. mss., 1906-1969, consist of the correspondence, writings and memorabilia of Sir Robert Hamilton Bruce Lockhart, 1887-1970, diplomat and writer.
The Stokes mss., 1905-1906, consist primarily of letters from Upton Beall Sinclair, 1878-1968, novelist, to James Graham Phelps Stokes, 1872-1960, regarding the activities of the Intercollegiate Socialist Society.
The Howatt mss., 1902-1959, consist in the main of letters to David Howatt, 1882-1964 , farmer and secretary of Upton Beall Sinclair, from writers Harry Kemp, Upton Beall Sinclair, and William James Durant.
The Sinclair mss. IV, 1900-1963, consists of correspondence, writings, and monetary statements of author Upton Beall Sinclair, 1878-1968, and of his wife, Mary Craig (Kimbrough) Sinclair, 1883-1961.
The Trotskii mss., 1900-1957, consist principally of the correspondence of Lev Trotskii, 1879-1940, Russian communist leader, and Max Eastman, 1883-1969, author, during the period when Eastman was preparing his book about Trotskii in 1922 and 1923 and later when he served unofficially as Trotskii's literary agent from 1929 to 1933.