I dont know how accurate some of the early Barton history is on Roger but there may be some reason to believe that he and his brother Rufus came over together from England. They were quakers and apparently Rufus had some problems and left NY and ended up in RI where he founded a large family. The brothers may have come over with an Edward Barton (their father ?). Rufus is strongly documented in RI history. I dont know if this helps but it may be worth checking out.