Correspondence files and financial papers. The files include correspondence, contracts, clippings and programs, ledgers and financial accounts, submission books, and calendars and memorandum books. Authors for whom there are extensive files include the following: Truman Capote; Patrick Dennis; John Dos Passos; Lloyd C. Douglas; John Hersey; Alice Tisdale Hobart; Paul Horgan; William Humphrey; Frances Parkinson Keyes; Margaret Mitchell; Alan Paton; Kenneth Roberts; Lillian Smith; John Steinbeck; George R. Stewart; Ben Ames Williams; and Kathleen Winsor

Correspondence, manuscripts, notes, notebooks, documents, photographs, course-related materials, and printed materials. The manuscripts include typescripts of Sykes' published and unpublished novels, monographs, plays, short stories, and articles. Among these are The Perennial Avant Garde, The Cool Millennium, and The Hidden Remnant. Sykes' notes and notebooks span the period from the early 1930s to 1980, and include preliminary ideas and sketches for his books, as well as autobiographical material. A small number of documents concern Sykes' wartime work in the U.S. Government Office of War Information. Course-related material including writings and correspondence of students taught by Sykes between 1962 and 1975 at the New School and as an adjunct professor at Columbia University. Printed materials consist of numerous reviews of Sykes' books, in addition to offprints and articles by Sykes. Included as well are printed materials about or connected with Sykes, offprints of articles inscribed to him, and many volumes from his library. The substantial correspondence series includes personal letters and correspondence with agents and publishers relating to his books. Correspondents include Harold Clurman, Aaron Copland, Lawrence Durrell, Georgia O'Keeffe, and Francis Steegmuller, as well as a number of Sykes' students. There is extensive correspondence between Sykes and the artist John Hartell from 1927 to 1983.

The correspondence, research, and teaching files of French-American cultural historian and Columbia University professor emeritus Jacques Barzun (1907-2012).

Correspondence, manuscript music scores, copies of scores, playscripts, scenarios, watercolor drawings and other stage designs, contracts, legal papers, programs, clippings and other printed materials, microfilms, records, tape recordings, and photographs. Among Moross's work are the musical play, "The Golden Apple"(1954), dance music for "Ballet Ballads"(1945) and for "Frankie and Johnny"(1938), the film score for "The Big Country"(1958) and for "The Cardinal"(1963), and his Symphony No. 1 (1943). There are some financial papers and production records for the staging of his works. Among the cataloged correspondents are Aaron Copland, Agnes George De Mille, Ned Rorem, Virgil Thomson, and Thornton Wilder.