Elizabeth Quay Andrews , the daughter of Beth and Mark Andrews of New York , was married there at St. Thomas Church yesterday to Reynolds du Pont III , the son of Onolee Coffey du Pont of Essex , Conn. , and Mr. du Pont Jr. , of Fishers Island , N.Y . The Rev . Andrew C. Mead , an Episcopal priest , officiated , and the Rev . C. Hugh Hildesley , also an Episcopal priest , took part in the ceremony .