The C. A. Earle Rinker Papers (1880-1960) contain materials that document the history of early twentieth century Goldfield, located in central Nevada, as well as the life of Rinker. Materials in the collection include correspondence, mining prospectuses, maps, ledgers, souvenirs, photographic negatives, and ephemera that document mining and daily life. Also included is biographical material that tells the story of Earle Rinker and his family before 1906 and after 1909, documenting his life in Indiana and Illinois.

The James D. O'Brien Photographs (approximately 1900-1929) are comprised of photograph albums and scrapbooks created by James D. O'Brien, surveyor, mining engineer and prospector. O'Brien's photographs feature locations throughout Central and Southern Nevada and Death Valley, California. Photographs depict life and work in mining camps; miners and their families; local Shoshone Indians; mining company financiers; landscape and mining towns. Locations include but are not limited to Pahrump, Nevada; Pioneer, Nevada; Rhyolite, Nevada; Wahmonie, Nevada; and Death Valley, California.