By act No. 12, the seat of justice of Rock county was established on the fraction of land on the east side of Rock River, part of the northwest quarter of section 36, town 3 north, range 12 east.

The evidence

• “By act No. 12, approved December 7, 1837, the seat of justice of Rock county was "established on the fraction of land, on the east side of Rock river, it being a part of the northwest quarter of section 36, in town 3 north, of range 12 east."”

  1908-brown-rock-county/05-historic-evolution.md, Vol. 1, PDF p. 133 / book p. 119

  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