Watseka: off topic

Please excuse the off topic post, but we obviously have a lot of people here from Illinois who are interested in history and hauntings. About eighty-five miles south of Chicago is a small town in Iroquois county called Watseka. I am writing a book about a famous case of spirit possession that occurred there in 1877-78 involving Lurancy Vennum and Mary Roff. I have been consulting with John Whitman roffhome.com, who is the current owner of the Roff house.