"Sanger Mine tunnel interior, Baker County, Oregon - circa 1894. Dan Hayes, foreman," using a pick axe. [Note the candle providing light in the bottom, left side, corner of image.]
"Mayflower Mine [Lane County]. Minersville Gold Mining and Milling Co. - circa 1901-1903. One of the miners is standing in the snow while leaning on a shovel at the tunnel entrance."
"Standard Con. Mines Co.'s Cobalt Mines - circa 1901-1903 - Main Tunnel, Willie Boy Tunnel" and "Standard Tunnel" are noted. "Grant County, Quartzburg District. East of Dixie Creek."