JOHN VANCE b. 1784 of Somerset Twp., Washington Co., Pa. and JANE (KERR)of North Strabane Twp., Washington Co., Pa. had 5 children that I know of: 1) JAMES S. VANCE m. ELIZABETH HART 2) MARY VANCE 3) JOSEPH VANCE (under 21 in 1839) 4) ELIZABETH VANCE 5) JANE VANCE m. LOGAN VAN EMAN Does anyone know anything about # 2) MARY VANCE. Did she marry? Thanks, Clare