Gregory mine. Black Hawk district. Colorado Company insolvent; interest transfer. R.M.News. Sept.26, 1874 p.4 c.5 Operating. R.M.News. June 22, 1878 p.4 c.4 Explosion; miner injured R.M.News. June 12, 1881 p.4 c.2 Flume being repaired. R.M.News. June 16, 1881 p.3 c.l Rich ore pocket. R.M.News. Nov. 13, 1881 p.7 c.2 Mine accident. k.M.News. June 13, 1883 p.3 c.l Production; yield. R.M.News. Aug. 2, 1884 p.6 c.2 .Machinery. R.M.News. Jan. 14, 1883 p.3 c.2 R.M.News. Jan. 28, 1883 p.7 c.3 R.M.News. Feb. 8, 1885 p.3 c.2
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