65 black and white photographic prints collected by John C. Sloss during his work as a mine developer. This collection includes: 7 views of the radial cableway at German Bar in Alder Gulch, Montana; 5 views of dredges at German Bar at Alder Gulch, Montana (possibly the Maggie A. Gibson); 1 view of Elkhorn, Montana; 1 view of the Elkhorn Railroad; 3 hunting views near Boulder, Montana, including pronghorn antelope and mule deer; 1 view of rail line near Boulder; 2 views of the John Sloss home in Seattle; Washington; 12 views of mines in Nevada, includes Dayton, Gold Hill, and Virginia City; 18 views of Alaska and possibly Washington, includes panning for gold, steamships, and various mountain views; 12 views of a survey near Eel River in California; 1 view of Sowden Ranch in Trinity River, California, 1 view of White Horse Rapids in Yukon Territory, Canada, and 1 view of a Keystone driller at an unidentified location.