A single horseman from Mineral Point, bearing the U. S. mail via Janesville to Racine, appeared on the west bank of the Rock river; the first United States mail entered Janesville.

The evidence

• “On the 23d day of April, 1837, a single horseman appeared on the west bank of the Rock river, from Mineral Point, bearing the U. 8. mail via of Janesville to Racine, Doct. B.”

  1856-history-of-rock-county/25-city-of-janesville.md, PDF p. 179 / book p. 161

  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