An act was approved changing the boundaries and name of the town of Oak to Porter, including township 4, north of range 11 east.

The evidence

• “an act of the legislature, approved February 2, 1846, it was incorporated by the name of Oak. At the next annual session, February 2, 1847, an act was approved changing its boundaries and name. It was made to include township 4, north of range 11 east, its present limits.”

  1908-brown-rock-county/31-smaller-cities-villages-towns.md, Vol. 2, PDF p. 200 / book p. 704

  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