Abstract The Herbert E. Gregory photograph collection contains images documenting various expeditions. Includes photographs of the geology of southern Utah, northern Arizona and Nevada, and eastern California. Also includes photographs of the Navajo and Hopi Indians and of the Indians and geology of Peru.

Abstract Harmon Percy Marble (1870-1945) was a journalist and politician who worked for the United States Office of Indian Affairs (later Bureau of Indian Affairs) from 1911 to 1926. This collection contains 11 sepia-toned prints taken by Marble and depicting Navajo and Pueblo people and Ancestral Puebloan structures.