The Indians signed a treaty of peace with General Gaines and Governor Reynolds, agreeing never to return to the east side.

The evidence

• “P. Gaines made a demonstration before Black Hawk's village June 25, 1831, which led those Indians to withdraw that night to the west bank of the Mississippi. June 30 they signed a treaty of peace with General Gaines and Governor Reynolds, agreeing never to return to the”

  1908-brown-rock-county/03-black-hawk-war.md, Vol. 1, PDF p. 45 / book p. 36

  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

  

• “Treaty with the Sauk and Fox, 1831 Treaty with the Sauk and Fox, 1831 June 30, 1831 ARTICLES OF AGREEMENT & CAPITULATION made & concluded this thirtieth day of June, one thousand eight hundred and thirty one, between E. P. Gaines, Major General of the U.S. Army, on the part of the United States; John Reynolds, Govenor[ sic ] of Illinois, on the part of the State of Illinois; and the Chiefs & Braves of the band of Sac-Indians usually called "the British band of Rock river;" with their old allies, the Pottowattamy Winnebago & Kikapoo nations, WITNESSETH, that Whereas the said British band of Sac Indians, have, in violation of several Treaties entered into between the United States & the Sac & Fox nations, in the years 1804, 1816, & 1825, continued to remain upon & to cultivate the lands on Rock river, ceded to the United States, by the said Treaties, after the said lands had been”

  https://treaties.okstate.edu/treaties/treaty-with-the-sauk-and-fox-1831-22489

  treaties.okstate.edu, https://treaties.okstate.edu/treaties/treaty-with-the-sauk-and-fox-1831-22489

  Grade B: Found on an institutional web page