Black Hawk mill. Gregory Proprietors prosecuted, cons. Ditch co; cause; result 1861 p. 3 a. I Operates Casey claim are, Burroughs lode; yield. Miners build road. Operates Mammoth lode ore; yield. R.M.Nevvs. Dec. 7, 1880 p. 2 a. 4 Crushes Bobtail lode ore; yield. 1860 0
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