Empire mill. Gilpin county, Colorado Stamps; ore crushed. R. M. News. Nov. 13, 1869. p.1 c.2 Operating; stamps. R. M. News. Oct. 12, 1882. p.7 c.3 Stamps; activities, 1879. R. M. News. Tan. 1, 1880 Fire pump installed for community aid. Number of stamps; operating. R. M. News. Dec. 15, 1881 p.3 c.1
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