The Rock County Agricultural Society and Mechanics' Institute held its annual Fair at Janesville. One passage gives the dates as October 4th and 5th; others give October 4th, 5th and 6th.

The evidence

• “R. Pease, which was fitted up at once, and the Fair 'was held there Oct. 4th, 5th and 6th, 1853.”

  1856-history-of-rock-county/28-agricultural-society-1853.md, PDF p. 293 / book p. 269

  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