1849
The divided territory at last became an independent town, with corporative powers.
BeloitGrade A · 1 independent source
The evidence
“At a subsequent date, when Turtle and Harmony were constituted, the south half became a part of Turtle, the north half a part of Harmony. After being divided and sub-divided, and bandied about, it at last became an independent town, with corporative powers in 1849.”
1856-history-of-rock-county/12-la-prairie.md, PDF p. 109 / book p. 91
Guernsey, Orrin, and Josiah F. Willard, editors. History of Rock County, and Transactions of the Rock County Agricultural Society and Mechanics' Institute. Janesville, Wis.: William M. Doty & Brother, 1856. Cornell University Library via the Internet Archive, archive.org/details/cu31924028871593.
Grade A: Found on a page of one of our sources
On the printed page (PDF p. 109 / book p. 91) · open the whole page