Statistics for occurrence #1 of “Gilpin county” in entry colorado of Harper's Encyclopedia of United States History:
...us metal brought about 400 persons to Colorado in 1858-59; and the first discovery of a gold-bearing lode was by John H. Gregory, May 6, 1859, in what is now known as the Gregory mining District, in Gilpin county .
An attempt to organize government among the miners was made by the erection of Arapahoe county, and the election of a representative to the Kansas legislature, Nov. 6, 1858.
He was instructed to...
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