We are also researching the Rushlow family.Just started in fact.We found the family you mentioned on line at the State of Michigan site Census recordsfor 1870.It listed Joseph as 28 years old, Wife Matilida and 6 childrenwith Peter at 14 years old. We're searching Ray Vincent Rushlow's ancestors and don't know if this family is related. Although we did find other Rushlow's listed in the census and will try to sort them out. Ray's father is Arthur David Rushlow. b 05/21/1885.Hope this helps.