1857
DeLorma Brooks started a weekly Democratic paper called the Herald, and shortly after N. O. Perkins published the first number of the Beloit Times; the two publishers printed on opposite sides of the same sheet.
The evidence
“During this year, 1857, DeLorma Brooks started a weekly Democratic paper, called the Herald, and shortly after that N. 0. Perkins published the first number of another Republican paper, the Beloit Times, and the two publishers effected an arrangement whereby the Democratic Herald was printed on one side of the sheet and the Republican Times on the other, the respective editors being entirely independent of each other.”
1879-history-of-rock-county/11-rock-county-ch05-press-institutions-tragedy.md, PDF p. 398 / book p. 402
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
On the printed page (PDF p. 398 / book p. 402) · open the whole page “E. Hale, editor, Republican. 1857, a weekly Democratic paper, the Herald. De Lorma Brooks.”
1908-brown-rock-county/00-front-matter-vol-1.md, Vol. 1, PDF p. 17
Brown, William Fiske, editor. Rock County, Wisconsin: A New History of Its Cities, Villages, Towns, Citizens and Varied Interests, from the Earliest Times, Up to Date. Chicago: C. F. Cooper & Co., 1908. 2 vols. archive.org/details/rockcountywiscon01brow, archive.org/details/rockcountywiscon02brow.
Grade A: Found on a page of one of our sources
On the printed page (Vol. 1, PDF p. 17) · open the whole page