old North American Company, at the head of which Mr. Astor still remained, began to range the country about the head waters of the Mississippi and the upper Missouri. Also a few American traders had ventured into the northern provinces of Mexico, previous to the overthrow of the Spanish Government; and after that event, a thriving trade grew up between St. Louis and Santa Fé.
At length, in 1823, Mr. W.H. Ashley, of St. Louis, a merchant for a long time engaged in the fur trade on the Missouri and its tributaries, determined to push a trading party up to or beyond the Rocky Mountains. Following up the Platte River, Mr. Ashley proceeded at the head of a large party with horses and merchandise, as far as the northern branch of the Platte, called the Sweetwater. This he explored to its source, situated in that remarkable depression in the Rocky Mountains, known as the South Pass—the same which Fremont discovered twenty years later, during which twenty years it was annually traveled by trading parties, and just prior to Fremont's discovery, by missionaries and emigrants destined to Oregon. To Mr. Ashley also belongs the credit of having first explored the head-waters of the Colorado, called the Green River, afterwards a favorite rendezvous of the American Fur Companies. The country about the South Pass proved to be an entirely new hunting ground, and very rich in furs, as here many rivers take their rise, whose head-waters furnished abundant beaver. Here Mr. Ashley spent the summer, returning to St. Louis in the fall with a valuable collection of skins.
In 1824, Mr. Ashley repeated the expedition, extending it this time beyond Green River as far as Great Salt Lake, near which to the south he discovered another smaller lake, which he named Lake Ashley, after himself. On the shores of this lake he built a fort for trading with the Indians, and leaving in it about one hundred men, returned to St. Louis the second time with a large amount of furs. During the time the fort was occupied by Mr. Ashley's men, a period of three years, more than one hundred and eighty thousand dollars worth of furs were collected and sent to St. Louis. In 1827, the fort, and all Mr. Ashley's interest in the business, was sold to the Rocky Mountain Fur Company, at the head of which were Jedediah Smith, William Sublette, and David Jackson, Sublette being the leading spirit in the Company.
The custom of these enterprising traders, who had been in the mountains since 1824, was to divide their force, each taking his command to a good hunting ground, and returning at stated times to rendezvous, generally appointed on the head-waters of Green River. Frequently the other fur companies, (for there were other companies formed on the heels of Ashley's enterprise,) learning of the place appointed for the yearly rendezvous, brought their goods to the same resort, when an intense rivalry was exhibited by the several traders as to which company should soonest dispose of its goods, getting, of course, the largest amount of furs from the trappers and Indians. So great was the competition in the years between 1826 and 1829, when there were about six hundred American trappers in and about the Rocky Mountains, besides those of the Hudson's Bay Company, that it was death for a man of one company to dispose of his furs to a rival association. Even a "free trapper"—that is, one not indentured, but hunting upon certain terms of agreement concerning the
