Ann Brewington Papers (1984-1987) consist of letters and clippings related to Nevada history. Correspondence is primarily from Anne Brewington's sister, Ida Brewington, to Brewington regarding Ida Pittman's death. This collection also contains a letter from Florence Cahlan and copies of letters sent to Cahlan about an article she had written on Ida Brewington Pittman. Also included is another article about Pittman that appeared in the December 2, 1984 Nevadan that has a few hand written notes in the margins, as do a few of the letters.

The Elizabeth von Till and Claude N. Warren Professional Papers (1916-2021) are comprised of the personal and professional papers of anthropologist Claude N. Warren and historical preservationist Elizabth von Till Warren. The materials in this collection primarily consist of research files, maps, and drawings on various archaeological and historical preservation projects in southern Nevada of which they both were involved. This collection includes field notes and surveys from archaeological projects such as the Old Las Vegas Mormon Fort and the Las Vegas Springs Preserve. Records on von Till Warren's involvement with the Old Spanish Trail Association, Southern Nevada Historical Society, and historic preservation work around southern Nevada are represented. Also included are Robert H. Crabtree's archaeological research files, a colleague of Claude Warren who bequeathed his professional files to him upon his death.