Then, the interest of the trader was against the dissemination of any knowledge which might induce immigration and hasten the certain ruin of his occupation. The stress of competition also caused him to remain silent concerning the places he had seen, lest a rival should profit thereby. He took no pains to reveal the country, and the trappers were too illiterate to do so had they wished. With the one notable exception which has been mentioned in a previous chapter, no important press notice of these regions appeared during the entire sixty-five years. The fur business itself quickly ran its course, and with it disappeared all probability of an early discovery of the geyser regions from this cause. The war with Mexico followed, with the vast cession of territory which it secured. Then came the highly important discovery of gold in California. Already the Mormon emigration had taken place. These great events completely changed the character and purpose of western exploration. The whole west was forgotten excepting only California and the Salt Lake Valley, and the routes leading to them. None of these led close to the geyser regions. On the north were the British fur trader's route, and the Missouri River route, both of which led directly west to the Columbia. To the south was the great thoroughfare along the Platte River and though South Pass, leading to Utah, California and Oregon. Still further south were the long known routes near the border of Old Mexico. It was hopelessly improbable that gold seekers bound to the Pacific Coast along any of these routes would stray into the mountain fastnesses about the sources of the Yellowstone. Finally the whole energy of the government in the field of exploration was directed away from this region. In the period from 1804-6, the date of Lewis and Clark's expedition, to 1870, the date of the real discovery of the Park, there were no fewer than one hundred and ten explorations in the country west of the Mississippi, nearly all of which had government authority, and were conducted on a scientific basis. Of these, eighty-four were in the territory lately acquired from Mexico, and mostly in the far south and west. Nineteen were east of the Bighorn Mountains, five north of the Yellowstone, and only two in the region about the Upper Yellowstone. Of these two expeditions one was that of Lewis and Clark, and was in no wise intended to explore the Upper Yellowstone further than might be necessary to find a good route to the Pacific. This leaves but a single expedition of the whole number, that of Captain Raynolds, which was directed to this specific territory. How the purpose of this expedition was defeated by the heavy snow in the mountains and by the solar eclipse of 1860, has been elsewhere related.