December 20, 1848
A meeting of the Board of Commissioners of the Madison & Beloit Railroad Company was held at Janesville, with stock subscriptions agreed to.
Rock CountyGrade A · 1 independent source
The evidence
“This urgency was not without its effect, as a meeting was promptly called, to be held at Janesville, an account of the proceedings of which appears in the Gazette of December 29, 1848, At a meeting of the Board of Commissioners of the Madison & Beloit Railroad Company, held pursuant to public notice at Janesville on the 20th of December, 1848, on motion of A. Hyatt Smith, Mr.”
1879-history-of-rock-county/10-rock-county-ch04-early-maps-courts-railroads.md, PDF p. 379 / book p. 383
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