1862. 2002-07-19T19:46:18Z. 2022-03-22T21:39:09Z. Pratt, John J., b. 1833. Lith. & printed by W.H. Rease, N.E. cor 4th & Chestnut St. English. Public. Colorado, Gilpin County, and Central City (Colo.).
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1901. 2021-01-20T21:25:44Z. 2021-01-23T04:01:38Z. Rank, Samuel A., cartographer. Bertha Gold Mining and Milling Company. English. cartographic image. Public. Colorado, Gilpin County, Gilpin County (Colo.), and Gilpin County.