May 14, 1840
The original plat of the village of Janesville was platted and recorded by the county commissioners; earlier sources date the replatting by the county commissioners to May 1840 and say Janes was dispossessed of his claim.
Rock CountyGrade A · 1 independent source
The evidence
“The town of Van Buren was platted into sixty-one blocks, that part in Dane county containing blocks No. 1 to 40 inclusive, and that part in Rock county blocks 41 to 61 inclusive. In comparison with this and other similar places we will state that the original plat of the village of Janesville, our county seat, platted on May 14, 1840, contained but fifty-nine blocks. Van Buren was laid out upon both sides of Badfish creek, and upon each side of the creek a wide space was reserved for "hydraulic purposes," as stated upon the map of the town site.”
1908-brown-rock-county/04-forgotten-places.md, Vol. 1, PDF p. 60 / book p. 50
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. 60 / book p. 50) · open the whole page