The biographical subject (P. O. Janesville, son of P. A. and Maria Pierce) was born in Lawrence Co., Vt.

The evidence

• “O. Janesville; born in Lawrence Co., Vt., June 1, 1828 ; son of P. A. and Maria Pierce ; removed to Rock Co., in October, 1840, when there were only two houses on the site of Janesville ; located on 160 acres, part of which is now the site of the State Asylum for the blind.”

  1879-history-of-rock-county/22-bios-rock.md, PDF p. 794 / book p. 798

  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