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450 rior. Truman A. Warren married his daughter Charlotte, and his brother Lyman M. Warren married another daughter, Mary.

At the time that the French retired, the Chippewa River was the road of war between the Sioux and Ojibways. Toward the sources of this river, at the lakes, once occupied by the refugee Hurons and Ottawas, the Ojibways had advanced from Lake Superior and established villages.

Before the close of the "War of the Revolution," in 1783, the Ojibways were occupying Sandy, Leech, and Red Lake, and Kay, Harris, Default, Perrault, and others had trading posts in northern Minnesota; and there was not left a Sioux village above the Falls of St. Anthony, and east of the Mississippi River.

Until the close of the last century the source of the Mississippi was supposed to be farther north than the Lake of the Woods. The Northwest Company of Montreal, desiring a knowledge of the region west of Lake Superior, employed David Thompson, who had been educated in the Blue Coat School, London, as geographer and astronomer. He was instructed to go as far as the Missouri River, and search for anything that would throw light upon the former and present condition of the country. In company with Hugh McGillis he left Grand Portage of Lake Superior on the 9th of August, 1796, equipped with an excellent achromatic telescope, a sextant of ten inches radius