The Winnebagoes' territorial claim was extensive, its southeast boundary stretching from the source of Rock river to within forty miles of its mouth, where they had a village.

The evidence

• “In 1820 they had five villages on Winnebago lake and fourteen on Rock river. In 1825, the claim of the Winnebagoes was an extensive one, so far as territory was concerned. Its southeast boundary stretched away from the source of Rock river to within forty miles of its mouth, in Illinois, where they had a village.”

  1879-history-of-rock-county/01-wisconsin-antiquities-indians-territory.md, PDF p. 22 / book p. 26

  Butterfield, C. W., et al. The History of Rock County, Wisconsin: its early settlement, growth, development, resources, etc. Chicago: Western Historical Company, 1879. Cornell University Library via the Internet Archive, archive.org/details/cu31924028871585.

  Grade A: Found on a page of one of our sources