Spring 1855
A family came West, locating in the town of Union, Rock county.
Rock CountyGrade A · 1 independent source
The evidence
“Orinda, wife of John Ellison, of Fredericksburg; and De Witt, of Beaver Crossing, Neb. The father, who was a farmer, came West in the spring of 1855, locating in the town of Union, Rock county, Wis., where he died in 1861 at the age of sixty-one. His wife died in Oneida county, New York, in 1850, at the early age of thirty-eight.”
1908-brown-rock-county/34d-biographical-4.md, Vol. 2, PDF p. 513 / book p. 999
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