A marriage took place in Chicago (to Mary Annen).

The evidence

• “John Burger was a baker in the old country, and came to Wisconsin, near Milwaukee, in 1849 ; in a few months, removed to Chicago and learned the butchering business ; was with the firm of Miller, Smith & Piper ; this was the only market on the North Side at that time; left in 1855, came to Beloit, and, in about five years from that time, engaged in business on his own account and has carried it on successfully ever since. Married Mary Annen, in Chicago, June 16, 1852; have had fifteen children, ten living — Maggie married Mr. Charles Fountain, A.”

  1879-history-of-rock-county/18-bios-beloit.md, PDF p. 732

  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