April 5, 1860
First issue of the consolidated Journal and Courier appeared.
The evidence
“Perkins appearing as editor. A paragraph at the head of the editorial columns of the first issue of the Journal and Courier, April 5, 1860, announces the consolidation, without explanation or comment. In their issue of October 31, 1861, Messrs.”
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
“Perkins editor. A bound file of the Beloit "Journal and Courier," complete, from April 5, 1860, to March 27, 1862, has been preserved by Mrs. N. 0.”
1908-brown-rock-county/30-press-of-beloit.md, Vol. 2, PDF p. 126 / book p. 635
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