On page 586...mentions "Nathaniel was the son of Thomas Harris (d. 1697) of Killingsworth, Conn, and his wife, Ruth, daughter of Rev. Thomas James, Jr..." ref. Vol. 17, Pa. Genealogical Mag., p. 79 & Vol. 105, N.E. Hist. and Gen. Register, p. 56.Also, on p. 39 wherein he writes of the Harrisses, the author gives references and notes see appendix items 3 & 4.