The Robert H. Crabtree papers (1920-1999) sub-series contains an extensive account of Crabtree's career as a professor and archaeologist. Materials includes correspondence, photographic prints and negatives, reports, and notes of archeological surveys and excavations done in Southern California, Southern Nevada, Washington, Oregon, and Mexico. Collection includes resources such as field catalogs, proposals, newsletters, annual reports, workflow documentation, conference materials, and meeting minutes from various archaeological and anthropological societies and organizations. The subseries also includes class notes, dissertation drafts, and manuscripts used by Crabtree during his academic career. Digital files include field notes and reports.

The Caddo Company, Incorporated series (1922-1965) is comprised of twelve sub-series containing film production and corporate records.

The first two sub-series contain materials related to two films that predate the formation of The Caddo Company, Incorporated as a production company, Swell Hogan (1926) and Everybody's Acting (1926), financed by Howard Hughes. The remaining sub-series represent the nine films produced under the Caddo banner and general corporate records.

Materials within each film sub-series include advertising and publicity, administrative, censorship, distribution, editing, financial, legal, and production and direction records, as well as film soundtracks and screenplays. Types of materials include of ledgers, correspondence, storyboard images, sheet music, and original scores, as well as film, direction, set, and production stills. Corporate records consist of newspaper clippings, administrative correspondence, actor and distribution contracts, and financial reports.