September 9, 1836
Governor Dodge issued a proclamation apportioning council and house members among the counties, directing an election for the second Monday of October and requiring members to convene at Belmont on October 25.
BeloitGrade A · 1 independent source
The evidence
“On September 9, Governor Dodge issued a proclamation apportioning the members of the council and house of representatives among the counties that had been organized in the territory, directing that an election of members of the council and house of representatives be held in the different counties on the second Monday of October, 1836, and requiring the members elected to convene at Belmont in the county of Iowa on October 25, next ensuing, for the purpose of organizing the first session of the legislative assembly of the territory.”
1908-brown-rock-county/05-historic-evolution.md, Vol. 1, PDF p. 132 / book p. 118
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