A future Rock County resident was born in Addison County, Vermont.

The evidence

• “P. 0. Union ; born in Addison Co., Vt., March 18, 1838 ; his father, Harvey Frost, came with his family to Wisconsin in 1849, locating in Union, Rock Co. ; he engaged in farming, where his son Samuel H. is now managing the estate, as his father is too old”

  1879-history-of-rock-county/30-bios-union.md, PDF p. 859 / book p. 863

  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