Thus was the territory of the great West practically parceled out among these three companies.[O] It must not be supposed that there was any agreement, tacit or open, that each company should keep within certain limits. There were, indeed, a few temporary arrangements of this sort, but for the most part each company maintained the right to work in any territory it saw fit, and there was constant invasion by each of the proper territories of the other. But the practical necessities of the business kept them, broadly speaking, within the limits which we have noted. The roving bands of "free trappers" and "lone traders," and individual expeditions like those of Captain Bonneville and Nathaniel J. Wyeth, acknowledged allegiance to none of the great organizations, but wandered where they chose, dealing by turns with each of the companies. [O] A singular and striking coincidence at once discloses itself to any one who compares maps showing the territories operated in by these three companies, and those which belonged to the three great families of Indians mentioned in a preceding chapter. By far the larger part of the Hudson's Bay Company's territory, as far west as the main range of the Rocky Mountains, was Algonquian. The American Fur Company's territory was almost entirely Siouan, and that of the Rocky Mountain Fur Company, Shoshonean. Nor did any company maintain an exclusive monopoly of its peculiar methods of conducting business. The American Fur Company frequently held rendezvous at points remote from its trading posts; and the Rocky Mountain Fur Company in later years resorted to the Missouri River as its line of supplies. In fact, the interests of the two companies finally became to such an extent dependent upon each other that a union was effected, in 1839, under the firm name of P. Chouteau, Jr. The records of those early days abound in references to the fierce competition in trade which existed between these great organizations. It led to every manner of device or subterfuge which might deceive a rival as to routes, conceal from him important trapping grounds, undermine the loyalty of his employes or excite the hostility of the Indians against him. It often led to deeds of violence, and made the presence of a rival band of trappers more dreaded than a war party of the implacable Blackfeet. The vigor and enterprise of these traders caused their business to penetrate the remotest and most inaccessible corners of the land. Silliman's Journal for January, 1834, declares that-- "The mountains and forests, from the Arctic Sea to the Gulf of Mexico, are threaded through every maze by the hunter. Every river and tributary stream, from the Columbia to the Rio del Norte, and from the Mackenzie to the Colorado of the West, from their head waters to their junctions, are searched and trapped for beaver."