Hi Jean: My records show a Joseph Duer b.1764, Bucks d. 1859 Bucks PA m first Ann Hampton,d. 1798,Bucks Co. PA..They had two children, James H, b. 1792 ( this is a wrong date for your James) and a dau Mary.Second wife was Sarah Kitchen 1771-1860 and they had 7 children.These names don't seem to fit your information and this is the only Joseph name I have which comes even close. Ed Whitley.