Consists primarily of the professional papers of prominent late 19th- and early 20th-century American theatrical stage manager and director William Seymour (1855-1933). The majority of papers include correspondence as well as numerous production-related materials, such as playscripts, promptbooks, and sheet music. Family members, particularly other well-known theater figures, such as Seymour's sister-in-law Fanny Davenport (1850-1898), are also represented in the collection through correspondence, production materials, ephemera, and newspaper clippings.

William Starr Myers (1877-1954) was a professor of history and politics at Princeton University and a noted historian of New Jersey and the Republican Party. The William Starr Myers Papers document the history of his teaching career and published works.