J. R. Briggs bought out his partner's interest in the Beloit Journal and continued publication alone.

The evidence

• “Beloit Journal, commenced by Stokes & Briggs, June 22d, 1848. J. 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

  

• “Briggs as editor, and, with Various changes of name and proprietors, has been continuously published down to the present time, and still lives and flourishes vigorously as the Beloit Free Press. In the fall of 1848, it passed under the sole control of J. B.”

  1879-history-of-rock-county/11-rock-county-ch05-press-institutions-tragedy.md, PDF p. 397 / book p. 401

  Butterfield, C. W., et al. The History of Rock County, Wisconsin: its early settlement, growth, development, resources, etc. Chicago: Western Historical Company, 1879. Cornell University Library via the Internet Archive, archive.org/details/cu31924028871585.

  Grade A: Found on a page of one of our sources