Correspondence, reports, research notes, articles, and speeches relating to Pargellis' activities on behalf of the Newberry Library and his scholarly pursuits. Prominent correspondents (Series 01 and 02) include Ray Billington, Everett D. Graff, Adlai Stevenson, and Thomas W. Streeter. Information on day to day library administration and special projects (e.g. Floyd Dell Joseph Freeman publication, Rockefeller Foundation grants, collection prospects) is located in the Administrative subject file. Pargellis' personal file includes correspondence and research and lecture notes dating from his boyhood and early career. The Association file contains a full record of Pargellis' active participation in the American Historical Association, the American Council of Learned Societies, Chicago clubs, and many other bodies. Pargellis' writings and speeches are fully documented in Series 06, Works.