Spring 1848
W. Bullock came to Wisconsin, locating at Beloit.
BeloitGrade A · 1 independent source
The evidence
“W. BULLOCK was born in Georgeville, Stanstead Plain, Canada, on Jan. 27, 1842 ; came to Wisconsin in the spring of 1848, locating at Beloit; from' Canada he went to Bloomington, 111., with his parehts, thence to Beloit, and learned the carpenter trade with his father ; he worked for Parker & Stone one year, and, August 10, 1862, enlisted in Co. B, 22d Wis.”
1879-history-of-rock-county/18-bios-beloit.md, PDF p. 732
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