The contents of this book were first given out by the author at Bible Conferences, and then appeared in their present form in Studies in the Scriptures.1 As the subject of them is of such importance to students of prophecy, and as so little has been published thereon, we have deemed it advisable to issue them, complete, in book form. So far as the writer is aware, only two or three comparatively brief booklets and essays have appeared on this particular theme, though to their contents we are indebted for a number of helpful suggestions. Our aim has been to present as comprehensive an outline as our space would allow. Much of what we have advanced will no doubt be new to the great majority of our readers. Frequently we have been obliged to deviate from the interpretations of those who have gone before us. Nevertheless, we have sought to give clear proof texts for everything advanced.