Lucinda Snow (wife) died.

The evidence

• “Warner came to Wisconsin in 1840, in Janesville, where he lived thirty-five years as a farmer. Married Miss Lucinda Snow in 1830, who locating died April 1, 1860, leaving six children — Otis A., Oscar W., Horace E., Henry, Ellen and Juliette. Republican ; was a delegate at the first Republican Convention held in Wisconsin ; was Justice of the Peace six years and Assessor six years in Janesville; is liberal in religion.”

  1879-history-of-rock-county/25-bios-milton.md, PDF p. 809 / book p. 813

  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