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322 Rock River

Rises a few miles west of Fond du Lac and running in a north and south easterly direction enters the Mississippi in the state of Illinois one hundred and sixty five miles below the south line of Wisconsin. It derives its name from some rocks near the mouth, seen in passing on the Mississippi, and not from its being more rocky than any other of the western rivers. The "Rock river country" is very favorably known for its fertility of soil, healthfulness, and for the beauty of its natural scenery. The numerous remains of an ancient people, and of their works found in its vicinity, indicate that this celebrity is not of recent date. This river may at very moderate expense be rendered navigable for small steamboats. The only obstructions within this territory are at four rapids, requiring locks and dams, and about ten bars or shallow places, of inconsiderable extent. The following table shows the extent and fall on these rapids; the distances

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