Separating the earlier from the later of the two great divisions of the book of Isaiah (i.-xxxv., xl.-lxvi.) stands a purely historical section, practically identical with and probably borrowed from 2 Kings xviii. l3-xx. 19, which finds its place here, no doubt simply because of its connection with the prophet Isaiah. It tells the story of Sennacherib's invasion of Judah, his insulting demands, whether transmitted through the Rabshakeh (xxxvi.) or by letter (xxxvii.), of Hezekiah's terror and Isaiah's divine word of reassurance, and of the ultimate departure of the Assyrian army. Ch. xxxviii. contains Isaiah's prophecy to Hezekiah of his recovery from sickness, with the king's song of gratitude. This is followed by another prophecy of the Babylonian exile, occasioned by an embassy sent to Hezekiah by Merodach Baladan, king of Babylon (xxxix.). This account omits the very important statement in 2 Kings xviii. 14-16 of the heavy tribute paid by Hezekiah to the King of Assyria, and inserts the psalm of Hezekiah, xxxviii. 9-20, which is no doubt later than the redaction of the book of Kings as it is not found there, and is, in all probability, a post-exilic psalm. It is not certain whether the accounts in xxxvi. 1-xxxvii. 9_a_ and xxxvii. 9_b_-37 are simply parallel versions of the same incident, or refer to two different campaigns. In the distinctly prophetical portion, xxxvii. 22ff, though there is much that recalls Isaiah, the passage in its present form can hardly be his. Ch. xxxvii. 26, e.g. would be a pertinent appeal to Israel, but hardly to Sennacherib; it rests, no doubt, on the later Isaiah (xl. 28, xlvi. 11). The prophecy of exile to _Babylon_, xxxix. 6, 7, is not natural at a time when Assyria, not Babylon, was the enemy. Again, xxxvii. 33, which denies that even an arrow would be shot, is hardly reconcilable with Isaiah's prophecy of an arduous siege for the city, xxix. 1-4. Further, the minute prediction that Hezekiah's life would be prolonged for fifteen years is not in the manner of Isaiah, nor indeed of any of the great prophets, whose precise numbers, where they occur, are to be interpreted as round numbers (e.g. seventy years in Jer. xxv. 11, xxix. 10); and the story of the reversal of the shadow on the sun-dial reflects the later conception of the prophet as a miracle-worker (cf. I Kings xiii. 3-6). The section, in its present form, must be post-exilic. CHAPTERS XL.-LV.