The Eugene Callaghan papers (1924-1988) consist of materials documenting Callaghan's professional career. Included are correspondence, notes, reports, maps, class materials, and scrapbooks. Eugene Callaghan (1904-1990) was a geologist for the United States Geological Survey. He conducted several investigations of various territories around Utah and its surrounding states.

The Horace Sylvester Snyder family papers (1902-2010) contain the personal and professional papers of Horace Sylvester Snyder (1912-2010) a professional photographer, and his father, Horace Greeley Snyder (1873-1951), the owner of multiple mines in the American West. The collection contains biographical information and correspondence of extended family members within the Snyder and Sylvester families.