John and Julia Burnham settled in Jefferson county, Wisconsin.

The evidence

• “Dutton married Miss Ellen F. Burnham, daughter of John Burnham and Julia (Thayer) Burnham, who settled in Jefferson county, Wisconsin, in 1844. Both are now deceased.”

  1908-brown-rock-county/34e-biographical-5.md, Vol. 2, PDF p. 581 / book p. 1065

  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