The second expedition up the Platte Valley was ordered in 1819 by John C. Calhoun, Secretary of War for President James Monroe, and was under the command of Major Stephen S. Long, of the corps of topographical engineers. Leaving Pittsburg, Pa., in April, 1819, Major Long proceeded westward and established his camp near the present site of Council Bluffs, Iowa, to which was given the name of Engineer Cantonment. Thence on June 6, 1820, with a number of scientists and a small detail of regular troops, he marched toward the mountains. On June 30th the party sighted the magnificent range of the Rocky Mountains, a view of which burst upon them in the full glory of the morning light. On July 3d they passed, as Long's annals read, "the mouth of three large creeks, heading in the mountains and entering the Platte from the northwest." These were undoubtedly the Cache la Poudre, the Thompson, and the St. Vrain. On July 5th they camped on the present site of Fort Lupton, and on July 6th on the present site of Denver, at the mouth of Cherry Creek. Thence the party followed the valley to the Platte Cañon, and, proceeding southward along the base of the mountains, returned eastward along the Arkansas.
BUFFALO BILL'S FIRST SITUATION.
Twenty-two years later, in 1842, came Lieut. John C. Fremont, the famous pathfinder, who traversed the Blue toward the Platte, reaching the valley at Grand Island, a portion of the party going up the North Fork toward Fort Laramie, and the larger part marching up the South Fork to Fort St. Vrain, which had then been established a number of years, and had become a noted rendezvous for trappers, hunters, and plainsmen. The following year the intrepid explorer left St. Louis on his second expedition, traveling the valleys of the Kaw and the Republican, reaching the Platte at the mouth of Beaver Creek, and arriving at Fort St. Vrain on July 4, 1843. I quote the words of Lieutenant Fremont as prophetic of the future of the valley. "This post," he says, "was beginning to assume the appearance of a comfortable farm. Stock, hogs and cattle, were ranging about the prairie. There were different kinds of poultry and there was the wreck of a promising garden in which a considerable variety of vegetables had been in a flourishing condition, but had been almost entirely ruined by recent high water."
Between the dates of the expeditions of Long and Fremont three noted trading posts had been established along the Platte in the immediate vicinity of the spot on which we are now assembled. The first of these was Fort Vanquez, built by Louis Vanquez in 1832, at the mouth of Clear Creek, then known as Vanquez Fork of the Platte. The next was Fort Lupton, a portion of whose walls are still standing, and the third was Fort St. Vrain, built in 1840. These forts, as they were called, were trading posts at which a large traffic in skins and furs was conducted, and which became the headquarters of such famous frontiersmen as Kit Carson, Jim Bridger, Jim Baker, Jim Beckwourth, and others, who in those days constituted the vedettes of the civilization of the country. I have not time to dwell upon their exploits, but I note their names as indicating that we stand upon historic ground, and that here in this valley were planted the first germs of the prosperous growth which to-day enfolds it in every department of its social, industrial, and commercial life.
In 1847 the Platte Valley became the highway of the Mormons in their exodus from Illinois to Utah. Two years later its trails were broadened by the California pioneers en route to the shores of the Pacific to share in the golden discoveries of Sutter and his companions.
In 1857 came the expedition of Col. Albert Sidney Johnston marching to Utah to sustain the laws and authority of the United States.
But a greater movement was now organizing to traverse and possess the valley of the Platte. In the fullness of time the crisis of its destiny had arrived. The year of 1859 dawned upon a nation fast drifting into the vortex of a civil war. The irrepressible conflict which for half a century had been going on between free and slave labor was nearing the arbitrament of arms, and absorbed all men's minds to the exclusion of events which were happening on the distant frontier. In the summer of 1858 Green Russell and a party of adventurous prospectors had discovered gold in Cherry Creek, a tributary of the Platte. The news spread, and grew as it spread, until the people living along the Missouri, which was then the frontier of the Republic, became excited over the richness of the discoveries.
They were ripe for adventure, desperate almost in their determination to reëstablish the fortunes that had been wrecked by the financial panic of 1857, which had swept with disastrous effect along the entire borderland of the entire nation. In the spring of 1859 the march of the pioneers began. The Platte Valley was their grand pathway to the mountains, whose summits they greeted with exultant joy, and beneath whose protecting shadows they camped; here to make their homes, here to lay the foundations of the future State.
Thus in a little over half a century from the date of its purchase by the Federal Government, the Platte Valley had become the home of civilized man, and the work of its development begun. As gold was first discovered in this valley, so was quartz mining first begun on one of the tributaries in Gilpin County.