The Diana Trilling Papers document the life of literary and cultural critic, Diana Trilling. This collection contains her writings, extensive correspondence with other New York intellectuals, and subject files for her research as well as for the Lionel Trilling Estate.

Letters written to Jacobson from Jacques Barzun, William Phillips, Mario Praz, David Stacton, Diana Trilling, and Lionel Trilling, concerning a variety of personal, literary, and academic matters. Also, a Stacton typescript, and one miscellaneous letter.

The Lionel Trilling Papers document the life of author, professor, and literary critic, Lionel Trilling. This collection contains his writings, extensive correspondence with other New York intellectuals, personal documents, and other records concerning his professional activities.

Manuscripts, recordings and administrative files related to the Lionel Trilling Seminars which were established as a memorial to Professor Lionel Trilling in 1976.

Correspondence, manuscripts, and notes. This collection contains the manuscripts for most of his books and articles. There are also copies of his many book reviews and articles by other authors analyzing the impact of his interpretations of American history. The correspondents include: H.S. Commager, C. Vann Woodward, Stuart Bruchey, S.E. Morison, Clarence Ver Steeg, Alfred A. Knopf, Helen Frankenthaler, Arthur Schlesinger, Jr., and others. There are also 70 books from his library

The Sol Stein Papers chart the literary life of author, editor and publisher, Sol Stein, who in addition to his own career as novelist and playwright, founded the publishing house Stein and Day. His papers contain correspondence with important literary figures; multiple drafts of his plays, novels and non-fiction writing; and correspondence which closely documents the editing process. The papers also include some material relating to Stein's political activities as Executive Director of The American Committee for Cultural Freedom and as Ideological Analyst and writer for The Voice of America.