Mines & mineral RESOURCES COLORADO GILPIN COUNTY Lode discovered, Gregory hill. R. M. News. May 18, 1871 p.l c.4 Number of mine patents received; act of 1866. R. M. News. May 21, 1871 p.l c.3 Mines idle; reason. R. M. News. June 11, 1871 p.l c.6 Activities. R. M. News. July 2, 1871 p.l c.4 Runkle technological party examines. R. M. News. July 28, 1871 p.l c.3 Production. R. M. News. Aug. 6, 1871 p.2 c.2 Gold veins & ore treatment reviewed, geological survey. R. M. News. Aug. 9, 1871 p.2 c.l
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