"The Humboldt (Imlay, Eldorado) district, on the north end and west flank of the Humboldt Range, was organized in 1860 as the first district in the area now included in Pershing County. By 1863, Humboldt City had been founded and had a population of 500. The principal mine was the Imlay, from which a considerable but unknown amount of silver ore was shipped. The Star Peak mine yielded $130,000 in silver and gold up to 1935 (Vanderburg, 1936b, p. 17). Early production data for the entire district are lacking, but from 1932 through 1959 the district produced 35,483 ounces of gold."  http://www.westernmininghistory.com/articles/130/page1