Correspondence, agreements, financial papers, wills, etc., documenting gifts to the Library of collections and money. Included are papers regarding the donation and endowed support of the Ayer, Wing, and Greenlee collections, and the Oakley fund for music. There are also donor files for personal papers (e.g., Willa Cather, Floyd Dell, Eunice Tietjens, Francis Fischer Browne, Henry Blake Fuller), railroad archives (Burlington, Illinois Central), and paintings (George P. A. Healy).