In the session of 1847-48, inhabitants of Township 2, Range 11, petitioned to be set off as a separate town.

The evidence

• “"In the same session of the Legislature, I believe, that portion of Township 8 north, Range 12 east, belonging to Center, was set off to Janesville, which left the former twelve miles in extent north and south by six miles east and west, the north half of.Township 3, in Range 11, having been attached to Center in the division forming the town of Porter. In the session of 1847-48, the inhabitants of Township 2; Range 11, petitioned to be set off as a separate town.”

  1879-history-of-rock-county/13-rock-county-ch07-town-histories.md, PDF p. 518 / book p. 522

  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

  

• “"In the same year of the legislature, I believe, that portion of township 3, north of range 12 east, belonging to Center, was set off to Janesville, which left the former twelve miles in extent north, and south by six miles east and west, the north half of township 3 in range 11 having been attached to Center in the division forming the town of Porter. In the session of 1847-48 the inhabitants of township 2, range 11, petitioned to be set off as a separate town, under the name of Plymouth, and their prayer was granted March 8, 1848. It will be seen, therefore, that the pioneers of Plymouth are the first settlers of Center.”

  1908-brown-rock-county/31-smaller-cities-villages-towns.md, Vol. 2, PDF p. 199 / book p. 703

  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 · may repeat 1879-history-of-rock-county, so not counted as independent