Three men working at Placer mining operation near Lake Alamur, Deer Creek River, 1906 

View of the Placer mine at Big Bar, Trinity County, showing a man with mining apparatus, 1900-1910 

Hydraulic Big Bar Placer Mine site, Trinity, 1906 (ca.1930?) 

Portrait of a prospector with his burros during the days of the gold rush, ca.1900 

Portrait of J.W. Vernon and Chas. Chanser sifting for gold on a river bank, Plymouth, ca.1932 

Automobile below a trestle of the old Central Pacific Railway Crossing near Highway Forty, 1936 

Lithograph from Norton's "Story of California" showing California miners at work, ca.1913 

Exterior view of the Consolidated Gold Mine in Mojave, ca.1900 

Miners about to descend into the Empire Gold Mine, Grass Valley, California, ca.1900-1930 

A gold dredge at work, Feather River, California, ca.1900 

Hirschman Diggings in Nevada City, ca.1930 

Exterior view Murchie Gold Mine in Nevada City, Nevada, 1907 

Drawing depicting a view of Sutter's Mill at Coloma, where James Marshall discovered gold in 1848, June 19, 1898 

Exterior view of the Mike Marquitz Saloon in Gold Hill, El Dorado County, California, ca.1900 

Exterior view of an abandoned cabin of the gold rush in Mulberry, ca.1930 

Interior view of a mine (named Bagdad Mine?) belonging to the Rochester Gold Mining Co., Ludlow, California, ca.1900 

A gold dredge in the river (or lake?), Oroville, California, ca.1930 

Merced River gold dredger in Merced Falls, ca.1930 

Exterior view of a school house on a hill in Gold Hill, Nevada, ca.1900 

View of a commercial street in Sutter's Creek, showing Sutter Creek Pharmacy, ca.1935