1. [Four images] [1]Gulch mining.--Colorado Gulch. [2] Spanish Arastra.--on Clear Creek. [3]The stamp Creator: A. E. Mathews, DelLith. By J. Bien. N.Y Published / Created: undated Call Number: WA Prints +206 Image Count: 1 Abstract: mining. Found in: Beinecke Rare Book and Manuscript Library > [Four images] [1]Gulch mining.--Colorado Gulch. [2] Spanish Arastra.--on Clear Creek. [3]The stamp process--Mr. Sensenderfer's Mill. Shaft or lode mining.--Interior of No. 1, on the Gregory, the Black Hawk Co.'s Mine