Born-Digital or AnalogAnalogTranscriptColumbia company Activities, Casselton mine; lodes intersected & cross cut; list, Gilpin county. , 1880. p.3 c.2 Operating Castleton.& Columbia mines, Black Hawk dist., Colorado. 1881 p.2 c.2 New rig and shafting, Virginia canon, Central City district ,Colo. R. M. News. Apr. 20, 1881 p.3 c.1 , 0CollectionWestern History Subject IndexRelated MaterialWestern History Subject Index AbbreviationsType of MaterialIndex CardLanguageeng
