A treaty was made at Chicago between the United States and the Chippewas, Ottawas and Pottawattamies, by which those nations ceded their lands along the western shore of Lake Michigan and between that lake and the Winnebago cession.

The evidence

• “15. An important treaty was made at Chicago, September 26, 1833, between the United States and the Chippewas, Ottawas and Pottawattamies. Those nations ceded to the government all their lands along the western shore of Lake Michigan, and between that lake and the land ceded to the United States by the Winnebago nation at the treaty at Fort Armstrong, September”

  1879-history-of-rock-county/04-wisconsin-railroads-commerce-health-statistics.md, PDF p. 212 / book p. 216

  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

• “September 26, 1833, the Ottawas, Chippewas and Pottawattomies ceded all east of that tract to Lake Michigan and north to the head of the Milwaukee river and a line reaching thence to the south end of Lake Winnebago. (This covers the east half of Rock county a second time.)”

  1908-brown-rock-county/02-ancient-occupants.md, Vol. 1, PDF p. 40 / book p. 32

  Brown, William Fiske, editor. Rock County, Wisconsin: A New History of Its Cities, Villages, Towns, Citizens and Varied Interests, from the Earliest Times, Up to Date. Chicago: C. F. Cooper & Co., 1908. 2 vols. archive.org/details/rockcountywiscon01brow, archive.org/details/rockcountywiscon02brow.

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