Correspondence of Williamson covering his college years and his positions at Bryn Mawr College, the New York Public Library, the Carnegie Foundation, and the Rockefeller Foundation. A significant portion of Williamson's Columbia University correspondence and memoranda is addressed to or related to Roger Howson, University Librarian from 1926 to 1940. The manuscripts, chiefly typescripts, are concerned with library science and educational topics. Also, clippings and pamphlet files with some related correspondence and typescripts dealing with education and particularly the use of television as a teaching aid.

The correspondence and working papers of the "Survey of Resources of the Columbia University Libraries" (unpublished typescript), 1941. This guide to the Libraries' resources was prepared to supply data for Robert B. Downs' RESOURCES OF NEW YORK CITY LIBRARIES (Chicago, A.L.A., 1942). The resulting typescript is kept at the Reference desk in Butler Library.

The office files of the University Librarian's Office of Columbia University Libraries, 1889-1948, are composed is composed chiefly of correspondence sent and received between Columbia University Librarians, library staff, Columbia University administrators, and outside individuals and organizations, as well as related reports, budgets, as well as related reports, budgets, and administrative material concerning the history of the library.

This collection contains the records of the Columbia University Libraries Copyright Advisory Office.

The Card Catalog is a negative 16mm. motion picture film of the Dictionary Card Catalog of Columbia University Libraries ca. 1938-1948. The film was meant to be a record copy of the catalog to be uded for reproducing it if it were ever mutilated or destroyed. Unfortunately, the quality of the film is so poor that it is unusable for reproduction. The films have been retained as a sample of the mid-twentieth century holdings of a large American academic library.

This collection contains the administrative records of the Rare Book and Manuscript Library, from its days as the Department of Special Collections to the present.

This collection consists of the publications of the special collection libraries at Columbia University.