The Donald Finkel Papers include his extensive research materials, journals, notes, and heavily revised manuscripts. A large collection of editorial matter toward all of his books and a small, yet revealing professional correspondence with editors and literary colleagues completes the Finkel Papers.

The Isabella Gardner Papers contain manuscript and editorial material toward most of her books drafts of individual poems as well as letters to and from various editors, friends, and family.

Manuscripts, scrapbooks, and clippings of work by Clark Mills McBurney. Also included are excerpts from work by William Jay Smith and Tennessee Williams concerning their youth in St. Louis, where they were both friends with McBurney.

The collection holds a wide variety of materials that document James Ingram Merrill's entire life.

The extensive correspondence is between Merrill and his family, friends, business associates, and others. Thousands of pages of heavily annotated notebooks, typescripts, worksheets, and galleys show Merrill's work towards poems, fiction, and drama. The audiovisual and personal material document other aspects of Merrill's life.

The Alexander Trocchi Papers include manuscripts of his novels, stories, essays and poems, the extant archives of Merlin, most of his manuscripts and correspondence concerning the Sigma Project, material relating to a large number of projects Trocchi was involved with in the 1960’s, and his journals and notebooks. The Trocchi Papers also house an extensive collection of magazines and ephemera, including material relating to the International Situationist movement.