The first argument, then, for the Isaian authorship of chapters xl.-lxvi. is that they form part of a book called by Isaiah's name. But, to be worth anything, this argument must rest on the following facts: that everything in a book called by a prophet's name is necessarily by that prophet, and that the compilers of the book intended to hand it down as altogether from his pen. Now there is no evidence for either of these conclusions. On the contrary, there is considerable testimony in the opposite direction. The Book of Isaiah is not one continuous prophecy. It consists of a number of separate orations, with a few intervening pieces of narrative. Some of these orations claim to be Isaiah's own: they possess such titles as _The vision of Isaiah the son of Amoz_.[1] But such titles describe only the individual prophecies they head, and other portions of the book, upon other subjects and in very different styles, do not possess titles at all. It seems to me, that those, who maintain the Isaian authorship of the whole book, have the responsibility cast upon them of explaining why some chapters in it should be distinctly said to be by Isaiah, while others should not be so entitled. Surely this difference affords us sufficient ground for understanding, that the whole book is not necessarily by Isaiah, nor intentionally handed down by its compilers as the work of that prophet.[2] Now, when we come to chs. xl.-lxvi., we find that, occurring in a book which we have just seen no reason for supposing to be in every part of it by Isaiah, these chapters nowhere claim to be his. They are separated from that portion of the book, in which his undisputed oracles are placed, by a historical narrative of considerable length. And there is not anywhere upon them nor in them a title nor other statement that they are by the prophet, nor any allusion which could give the faintest support to the opinion, that they offer themselves to posterity as dating from his time. It is safe to say, that, if they had come to us by themselves, no one would have dreamt for an instant of ascribing them to Isaiah; for the alleged resemblances, which their language and style bear to his language and style, are far more than overborne by the undoubted differences, and have never been employed, even by the defenders of the Isaian authorship, except in additional and confessedly slight support of their main argument, viz. that the chapters must be Isaiah's because they are included in a book called by his name. Let us understand, therefore, at this very outset, that in discussing the question of the authorship of "Second Isaiah," we are not discussing a question, upon which the text itself makes any statement, or into which the credibility of the text enters. No claim is made by the Book of Isaiah itself for the Isaian authorship of chs. xl.-lxvi.