The Robert David Cohen Papers include correspondence from Robert Sward and Ann Quin to Cohen, written while Cohen lived in Mexico in 1968-1969, as well as poetry manuscripts written by Cohen alone and by the three authors together. The collection also contains a notebook by Cohen which held notes about Sward and notes toward The Play, a collaborative work by Sward and Cohen.

The papers of William G. Eliot include diaries, letters, published works, published and unpublished sermons and talks, newspaper clippings of articles written by or about Eliot, photographs; and biographical and other material about Eliot. Also included in the collection are enslavement documents, which include letters and bonds of indemnity as Eliot purchased enslaved persons in order to emancipate them.

The George Fehl III Collection consists of pencil, color, and ink wash sketches drawn by Fehl.

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.

Various journals collected by Hawes

The Arthur C. Hoskins collection contains items directly related to Hoskins and his family, including correspondence and records of expenses, and also items related to Missouri Historical Society activities. Certain items, which are connected to material previously collected by Hoskins, but whose source is unknown, have been placed in the collection because of their convenient connection.