Correspondence, scripts, scores, set designs, prompt books, scrapbooks, costume designs, programs, playbills, broadsides, clippings, fliers, photographs, announcements of forthcoming productions, clippings, and related materials. Columbia University theatrical groups include The Columbia Laboratory Players, The Columbia College Dramatic Group, The Wigs and Cues, The Summer Session Classes in Play Production, The Morningside Players, and the Columbia Theatre Associates which superseded all the preceding groups. There is an extensive file on the Columbia Laboratory Players; including production files that document the various stages involved in putting together a dramatic production. In addition there are typewritten scripts representing the spectrum of plays that were produced over the Lab's active years. There are photographs of only a few specific plays. Non Lab materials relate to Rehersal Course productions, a Columbia English Department course that was closely affiliated with the Lab players