1845
The town (northeastern town of the county, later set off under the act of Feb. 24, 1845) was organized; Lima was organized separately as a town in 1845.
The evidence
“And as he is noted for his public spirit; when Rail Roads began to claim the attention of the public in this vicinity, he at once entered into the subject with energy; and has since worked in that cause with a hearty good will, And to-day he would claim no higher title than " Railroad Man."— Whether this is the ultimatum of this chain of "odd titles," the future only can reveal, And in conclusion I will say, that almost the entire success of the present village of Milton can be attributed to his efforts and liberality, This township was not organized until the year 1842, when with many other towns it organized under an act of our territorial Legislature. At that time, this township and the now town of Lima were both united under the name of Milton, Lima was organized separately as a town in 1845.”
1856-history-of-rock-county/14-milton.md, PDF p. 124 / book p. 106
Guernsey, Orrin, and Josiah F. Willard, editors. History of Rock County, and Transactions of the Rock County Agricultural Society and Mechanics' Institute. Janesville, Wis.: William M. Doty & Brother, 1856. Cornell University Library via the Internet Archive, archive.org/details/cu31924028871593.
Grade A: Found on a page of one of our sources
On the printed page (PDF p. 124 / book p. 106) · open the whole page “"This township was not organized until the year 1842, when, with many other towns, it organized under an act of our Territorial Legislature. At that time, Milton and Lima were both united under the name of Milton, and Lima was not organized as a separate township until 1845.”
1879-history-of-rock-county/13-rock-county-ch07-town-histories.md, PDF p. 513 / book p. 517
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 · may repeat 1856-history-of-rock-county, so not counted as independent
On the printed page (PDF p. 513 / book p. 517) · open the whole page