Mines and mineral resources. Colorado . Idaho Springs district. Proposed sampling works; mines; list. R.M. News. Mar. 25, 1883 p.3 c.2 Activities, mines & companies; list. - R.M. News. Mar. 26, 1885 p.3 c.2 Rich strike; description, Squirrel gulch. R.M. News. Mar. 27, 1883 p.2 c.2 Rich strikes; activities, mines & companies; list. R.M. News. Mar. 29, 1883 p.2,c.1 Activities, mines; list. R.M. News. Oct. 14, 1883,p.7 c.5