With this edition of the Notes on the Book of Revelation we have not found it expedient to present any accompanying or supplementary notes. The author’s text has been carefully revised, and many errors which had crept both into the American and English editions have been corrected. On certain points we could have wished a little more fulness. The important question of the date of the book; the history of apocalyptic interpretation; and the principles of prophetic interpretation, particularly as regards designations of time, are matters lying at the very foundation of just views of the Apocalypse. The first of these points has, indeed, a page or two allotted to it in the “Introduction,” and is also incidentally noticed in the commentary; the second is less or more touched on in the exposition of difficult passages; but the last is almost entirely overlooked, on the ground that the author intends a full discussion of the subject in his forthcoming volume on Daniel. We somewhat regret this, because of the importance of the Year-day principle itself, and because every reader of the Notes on the Book of Revelation may not possess, or have immediately at hand, those on Daniel. We have no doubt that the author’s defence of this part of the Protestant citadel will prove one of the most able that has yet been given. It will, beyond a doubt, avoid the errors of those who have weakened the argument by insisting on points which, at best, are uncertain; and place the theory on a basis sufficiently broad to admit of rational and hopeful maintaining of it, in spite of numerous learned and able assaults. In the meantime, that our edition may not be without something, however brief and imperfect, on a point which on {xiii} all hands is allowed to be fundamental, we purpose to devote the following pages to an examination of the Year-day principle.