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"On June 27, 1867, mountain man Lewis Robison, the grizzled Mormon veteran who ten years earlier had put the torch to Fort Bridger as the U.S. Army approached, rode into Great Salt Lake City with two other men and entered the East Temple Street offices of Bohm & Mollitor, assayers. The men carried 40 ounces of gold dust reportedly crushed from quartz rock in two days. The assayers refined the ore into a gold bar valued at $740.06, with a fineness of 934 ½. "The only account the discoverers have as yet given is that the mines are about 200 miles from here and are rich," Utah’s first daily newspaper observed. Within a week, the road to Green River was crowded with citizens from Salt Lake. Five days later the Union Vedette ran the banner headline, "The New Gold Mines," reporting that the mines had "set the people wild in this locality." Influential eastern newspapers, notably the Times and Tribune of Chicago, picked up the initial announcements in the Vedette, and the Salt Lake Journal kept up a steady drumbeat of reports. Wyoming's gold rush was on."
Source: Will Bagley, South Pass Gold Rush