A treaty was proclaimed between the Sioux and Chippewa, Sac and Fox, Menomonee, Iowa, Winnebago, and a portion of the Ottawa, Chippewa and Pottawatomie tribes, for promoting peace and establishing boundaries; the Winnebago country it created was bounded on the southeast by Rock River.

The evidence

• “Subsequently, a treaty proclaimed February 6, 1826, was entered into with the Sioux and Chippewa, Sac and Fox, Menomonee, Iowa, Sioux, Winnebago, and a portion of the Ottawa, Chippewa and Pottawatomie tribes, for the purpose of "promoting peace among these tribes, and to establish boundaries among them and the other tribes who live in their vicinity." Article VI of this treaty is to this effect : " It is agreed between the Chippewas and Winnebagoes, so far as they are mutually interested therein, that the southern boundary line of the Chippewa country shall commence on the Chippewa River, half a day's march below the falls of that river, and run thence to the source of Clear Water River, a branch of the Chippewa; thence south to Black River; thence to a point where the woods project into the meadows, and thence to the Plover Portage of the Wisconsin."”

  1879-history-of-rock-county/08-rock-county-ch02-mounds-indians-black-hawk-settlement.md, PDF p. 323 / book p. 327

  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