The ease with which the American domain had been permitted to extend to the Mississippi in the peace negotiations with Great Britain did not mean a freedom from future anxiety concerning the "back lands," lying to the west of the thirteen States. The entire domain contained about 827,000 square miles, inhabited by about three million people, very unequally distributed. Population was most dense near the coast and gradually shaded off toward the interior. The front wave of civilisation may be located by an irregular line passing through central New Hampshire, skirting Lake Champlain, narrowing down to the Mohawk valley, and across north-western New Jersey, whence it turned due west across the mountains in a long arm reaching to Pittsburg. Retreating to the Shenandoah valley, it descended to central Georgia and thence to the sea. An "island" of people was to be found in central Kentucky and another in north-central Tennessee. A great tract of vacant but desirable land, comprising probably three-fourths of the domain, stretched from within two hundred miles of the seacoast to the distant Mississippi River. Barring a few French villagers, it was inhabited only by savage men and beasts. The lack of co-operation among the colonies in managing the Indians had made a lasting impression. During the Revolutionary War, the Congress gradually assumed the management of the savages to keep them from serving the British forces. This was especially true of the tribes dwelling beyond the recognised limits of the thirteen States. The State Governments readily consented to allow the central body a large control in this matter, because it meant so much for the common defence. The British method of Indian agents and commissioners for different geographical departments was adopted by the Congress, the whole being placed under control of the Department of War. The National Government thus came into control of the savages who inhabited the vast trans-Alleghany region. The thought naturally followed that it should be given control of the land itself, if it were to manage the savages successfully. Following the war, commissioners and agents complained that they could not get the confidence and trade of the Indians of the North-west, because of the influence of the British troops remaining in the forts, in that quarter. According to the stipulations of the treaty of peace, the forts located on the American side of the boundary line were to be evacuated. There were some half-dozen of these posts, ranging along the international line from Michilimackinac at the head of Lake Huron, to Dutchman's Point, near Lake Champlain. The number of troops in each was not sufficient to cause any fear of invasion; but their presence produced an uncertainty in the Indian mind whether the control was still with the British or had passed to the United States. The fur trade, which should have passed through the States, was diverted to Canada along the old lines.