R. Briggs, Jr. formed a partnership with C. G. Foster, of Troy, N. Y.

The evidence

• “R. Briggs, jr., bought out his partner's interest, in the fall of 1848, and continued the publication alone until Sept., 1849, when he formed a partnership with C. G, Foster, of Troy, N. ¥Y.”

  1856-history-of-rock-county/06-beloit.md, PDF p. 85 / book p. 67

  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