CHAPTER I.

_Introductory observations on the sources of the Mississippi.—Pike’s expedition in 1805, for exploring its course, and ascertaining its origin.—The expedition of Gov. Cass, directed to the same objects, in 1820.—Its extent, termination, and results.—Renewed efforts to ascend to its source, by the author, in 1831.—Diverted to the unexplored country lying in the area between Lake Superior and the Upper Mississippi, south of St. Anthony’s Falls.—Summary of the route.—The St. Croix and Chippewa Rivers.—Massacre of the Monomonees at Prairie du Chien, in 1831.—Mine country.—Return to the Straits of St. Mary._