Kewanee, a city of Henry County in northwestern Illinois, lies about 45 miles northwest of Peoria, Illinois. The town became a prairie boom town along the railroad tracks in 1854. In 1856 those tracks were appropriated by the Chicago, Burlington & Quincy Railroad.
This information came from a biographical website of Buffalo Bill Cody who was intent on settling and developing the Bighorn Basin in North Central Wyoming. Apparently, he was actively recruiting persons to help his efforts along, including my great uncle, Ernest Davis Mayhew.