An act was approved dividing Rock County into two Senatorial Districts.

The evidence

• “Sixth Session, 1863.- —[This Legislature convened January 12, and adjourned till the 6th of June, in order that the Senate might sit as a court to try and the Assembly might prosecute Levi Hubbell, Judge of the Second Judicial Circuit, impeached for corruption and malfeasance in ofiice. The Legislature reconvened for this purpose June 6, and finally adjourned on the 13th of July, 1853.] [By an act approved April 19, 1852, the county was divided into two Senatorial Districts, the towns of Janesville, Rock, Fulton, Porter, Center, Plymouth, Newark, Avon, Spring Valley, Magnolia and Union constituting the Seventeenth District, and the towns of Beloit, Turtle, Clinton, Bradford, La Prairie, Harmony, Johnstown, Lima and Milton the Eighteenth. The Assembly Districts were reduced to iour, viz. : The towns of Beloit, Turtle and Clinton, one ; the towns of Milton, Harmony, Lima, Johnstown, Bradford and La Prairie, one ; the towns of Janesville, Rock, Center and Fulton', one, and the towns of Porter, Union, Magnolia, Spring Valley, Plymouth, Newark and Avon, one.]..”

  1879-history-of-rock-county/10-rock-county-ch04-early-maps-courts-railroads.md, PDF p. 371 / book p. 375

  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