A quarterly meeting of the Rock County Agricultural Society and Mechanics' Institute was held at Janesville.

The evidence

• “Read before the Rock County Agricultural Society and Mechanics' Institute, at the quarterly meeting, held at Janesville, Sept. 6th, 1852.”

  1856-history-of-rock-county/28-agricultural-society-1853.md, PDF p. 312 / book p. 288

  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