I can help a little bit but I too have not found the missing sons of Benjamin and Sarah Cole. Benjamin's father was Dr. Joseph Cole (referred to as Joseph, Jr. to differentiate him from Joseph Cole, Sr. - they are not father and son). Dr. Joseph Cole was born in 1792 in Warren County, PA, He married Mary Cole (b. 1795 in Warren County, PA) in Warren County, PA abt. 1812. Mary was the daughter of Joseph Cole, Sr. and Elizabeth Reese Cole. I am almost sure that Dr. Joseph and Mary were first cousins. That would make Joseph, Sr. both his uncle and his father-in-law.