May 1853
Mr. Ritcher came to Wisconsin in the latter part of May, 1853, and located in Beloit.
BeloitGrade A · 1 independent source
The evidence
“JOHN RITCHER, butcher. East Bridge street; came to Wisconsin in the latter part of May, 1853, and located in Beloit; he was born in W^orms, Germany, and from there came direct to Beloit, in 1853, where he engaged in the market business ; Mr.”
1879-history-of-rock-county/18-bios-beloit.md, PDF p. 758 / book p. 762
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