On the date, see Charles C. Torry, The Lives of the Prophets, Society of Biblical Literature (SBL) Monograph Series 1 (Philadelphia: SBL, 1946), p. 11; and Douglas Hare, “Prophets, Lives of,” in the Anchor Bible Dictionary (Garden City, New York: Doubleday, 1992), vol. 5, pp. 502–503.