Have you tried the census for the area during those dates Mary Gove Peck was alive? Also The Waukesha Museum is really great. I asked them to search for 3 surnames and they came back with 30 pages of information including platt maps showing land ownershoip over a 100 year period. It is hard to search for Mary without the first name of the Peck she married.Wasn't that on Ellen's marriage certificate? What about birth and death records and marriage records for Mary Gove to _____Peck?