November 1, 1846
The [Nichols] family reached the home of Lewis Nichols in Winnebago County, Illinois, just south of the Wisconsin line near Beloit.
The regionGrade A · 1 independent source
The evidence
“Delana Fox Rawson, they were all sick with bilious fever. Resuming the journey near the close of October, they finally reached the home of his brother-in-law, Lewis Nichols, November 1, 1846, in Winnebago county, Illinois, just south of the Wisconsin line near Beloit. Cyrus had used up all his means and $200 of borrowed money, but bravely started into the work of making a farm from native prairie and small wood lot.”
1908-brown-rock-county/34a-biographical-1.md, Vol. 2, PDF p. 314 / book p. 812
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