Contains cyanotype photographs taken by H.E. Mathews. Photographs depict Donner Lake, the Donner Dam, a natural dam in Donner Valley, a panorama of Donner Lake (contains four plates, but some plates appear to be missing) and another panorama of a natural dam (contains only one plate, second plate appears to be missing). Photographs have been incorrectly labeled "Placer County." Donner Lake is in Nevada County.