"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."
"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.]