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423 Rivers

south and from one to three miles broad, with a small island near the south end. From this lake there is a portage of two miles over a dry pine ridge [about] to the head of the Bois Brule river of Lake Superior. The branches of the St. Croix connect, by short portages, with the Chippewa, the Ishkodewabo (or Rum) and the Mauvaise rivers. At the Falls of th St. Croix Greenstone rock is found. Mills have been erected here and some other improvements commenced. The quantity of pine lumber manufacured on the St. Croix is estimated at five millions of feet annually. Above the Falls the river is full of rapids, and falls; the whole descent of the river being estimated at seven hundred feet.

The St. Croix is about one hundred yards wide at its mouth which is opposite an island in the Mississippi; and on the right bank at the mouth, there is a perpendicular ledge of sandstone about ten feet high. A few hundred yards above the mouth commences the Lower St. Clair Lake, which extends thirty six miles with a breadth [width] of

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