October 5, 1846
The first Constitutional Convention assembled at Madison to draft a state constitution (the act specified the first Monday in October). One 1908 passage instead states that the convention met in December 1846.
The evidence
“October 5th, 1846, a convention was held at Madison for the purpose of drafting a State Constitution, which was adopted in convention, December 16th, 1846, but rejected by a vote of the people at the election held on the first Tuesday in April, 1847. A.”
1856-history-of-rock-county/01-wisconsin.md, PDF p. 21 / book p. 3
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
On the printed page (PDF p. 21 / book p. 3) · open the whole page “First Convention. — The first Constitutional Convention assembled at Madison the 5th of October, 1846, and adjourned the 16th of December following, having framed a Constitution which was rejected by the people at the election held on the first Tuesday in April, 1847. Members : A.”
1879-history-of-rock-county/10-rock-county-ch04-early-maps-courts-railroads.md, PDF p. 371 / book p. 375
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 · may repeat 1856-history-of-rock-county, so not counted as independent
On the printed page (PDF p. 371 / book p. 375) · open the whole page “The constitutional convention met at Madison October 5, 1846. The delegates from Rock county were David Noggle, A.”
1908-brown-rock-county/05-historic-evolution.md, Vol. 1, PDF p. 138 / book p. 123
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. 138 / book p. 123) · open the whole page