Correspondence and subject files covering all aspects of Detterer's professional work at the Newberry. Subject files relate specifically to the administration of the Wing Collection (exhibitions, booklists, statistics, Wing Classification, and WPA printing magazine project) and printing in general (calligraphy, Oriental printing, an incunabula census, and printing presses). There are also printing samples and correspondence from such organizations as the American Institute of Graphic Arts, the Calligraphy Study Group, and the Caxton, First Edition, and Grolier Clubs and there is correspondence with Ray DaBoll, Eric Gill, Frederic Goudy, Alfred Hamill, and others. In addition, there are project files (correspondence, drawings, proofs, revisions, artifacts) relating to Detterer's design of the Newberry Library Bindery Typeface.