John M. Cobb came to Beloit and joined the Rock River Paper Co.

The evidence

• “Clark is now in California, JUWD M. COBB, Secretary and Superintendent of the Rock River Paper Co.; came to Beloit in May, 1858 ; he has been connected with the company which he now represents ever since, except a part of 1859 and 186tl ; superintendent of the mills since 1862, secretary for the last five years, and has had general charge of the business for eight years ; he is also a member of the firm of Booth, Hinman & Co., paper dealers, of Beloit ; Mr.”

  1879-history-of-rock-county/18-bios-beloit.md, PDF p. 738 / book p. 742

  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