Edward S Duffield shows in the 1850 PA census. He would have been about 23 years old at the time and his mother's name was Margaret (Glass or Dyke) Duffield--prior to her marrying into the Duffields she was married to an Adam Seits(z)--his fathers name was George Duffield. From what I have found of Margaret she was born in PA and so was George. Edward S Duffield would have been my great-great-great grandfather. The middle name of Milton shows in my family line in my great-great grandfather's name which was James Milton Duffield, then in one of my great uncles John Milton. I don't know whether this information is of any help at all but that is what I have to share with you!