Peter Schickele (b. 1935) is an American composer, music educator, and satirist. He is best known for his comedy pieces composed by the fictional character P.D.Q. Bach. The collection contains manuscript and engraved scores and parts, sketches, revised and annotated copies of Schickele's work. In addition, the collection contains scripts of dramatic pieces or spoken introductions, correspondence, and memorabilia.

Vladimir Rosing (1890-1963) was a Russian tenor, producer, and director (primarily of opera) who worked largely in Britain and the United States. His papers include ephemera relating to his vocal and directorial career, but principally comprises his writings on art and politics, as organized and edited by his wife, Ruth, and son, Richard.