This subseries contains the records of Lawrence Heyl, Alexander Wainwright, Richard Ludwig, William Joyce, and Ben Primer; five individuals who were heads of the Department of Collections. The Wainwright, Ludwig, and Primer files constitute a small amount of material, while there are considerably more records documenting the tenures of Heyl and Joyce. The records consist of correspondence and subject files. The main topic documented in these records is collection development, and many of department's most notable collections are discussed to some degree. Of particular interest in this regard are the materials pertaining to the F. Scott Fitzgerald Papers and the Booth Tarkington Collection, among many others. The greater topical variety in the records of later Associate Librarians indicates to some degree the added administrative aspects of the position demanded by the Department's growth.