Rachel Calder Ashworth family papers and histories contains family histories, biographies, autobiographies, family records, pedigrees and photographs of her pioneer ancestors and their families, many of whom were in Vernal, Utah. Some of the more frequently mentioned families are the Ashworths, the Mentzers, the Hackings, and the Calders. Dated from approximately 1900 to 2015.

Contains a family photograph book, pocketbooks, an autograph book belonging to John A. Vance, and a New Testament presented to David G. Calder from the captain of the S.S. Wisconsin in 1879. Materials dated 1873 to 1974.

Contains physical and digital copies of scrapbooks, photographs, ephemera, and family histories of Edgar Hague Calder and two generations of his ancestors, including his grandfather, David O. Calder, and Edgar's wife, Melba Vance Calder, and two generations of her ancestors. Also includes various books, such as an autograph book, pocketbooks, and photograph books. Dated approximately 1850 to 2005.

Photographs of various Calder family members, most of which are not identified. Includes at least one daguerreotype and the original albums the photographs were stored in. Dated approximately 1860 to 1934.

Scrapbooks on various Calder family members, including David G. and Sarah E. Hague, Edgar Hague, Melba Vance Calder, John A. and Matilda Martin Vance, and David O. Calder. Scrapbooks include family history notes and narratives, clippings, family group sheets, greeting cards, postcards, correspondence, and other ephemera. Also includes some loose material, such as photographs, calling cards, and other documents. Dated approximately 1850 to 2005.