I have a Sally Cummin(g)s in my tree who married David Cook, nephew of Robert Fulton on May 21 1805 in Washington County, Pa. David was the son of Peyton Cook and Isabella Fulton, sister of Robert Fulton. He was the business agent for Livingston and Fulton in Pittsburgh. Bondsman for the wedding was David Morris. David Morris was the husband of Mary Fulton, Robert and Isabelle's sister.