Series 6 is divided into the following subseries: Announcements, Audiovisual Materials, Handbills, Postcards, Print Material, Prospectus, Publicity Pamphlets, Scripts, Theater Programs, Objects, and Posters. Arranged alphabetically within each subseries. In addition to O'Neill productions it includes materials related to productions featuring James O'Neill, his father.

See also Series 5. Materials Related to Premier Eugene O’Neill Productions