The second meeting of the Rock County Agricultural Society and Mechanics' Institute was held at the courthouse in Janesville.

The evidence

• “The second meeting of the Society was held on the 3d day of February, 1851. The following is the official report:”

  1856-history-of-rock-county/26-agricultural-society-1851.md, PDF p. 220 / book p. 198

  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