I cannot close this preface without again recurring to the advantage of the mode now becoming more and more general, of computing time in ancient history according to the number of years before Christ. The fact of its being certain and convenient has often been remarked; but besides this it possesses the great advantage of giving us at once a clear and precise notion of the interval that separates us from the incidents recorded; which it is impossible to obtain by the use of any other era, whether the year of the world, the olympiads, or the year of Rome, etc. And yet this peculiar advantage, so great in the eyes of the teacher, has not, to the best of my knowledge, been hitherto made the subject of remark. Even for the science of history itself, this circumstance is of greater moment than might be at first supposed. Should an enquirer arise who would closely examine all ancient history according to this era--setting out from the generally received year of the birth of Christ as from a fixed point, to which the labours of M. Volney are a good beginning--the whole science would thereby acquire a firmer consistency. For by this method all dates would not appear equally certain and equally uncertain, as they do in the eras which are computed from the year of the world; but it would be shown what is chronologically certain, what only probable, and what completely uncertain, according as we should recede from the clearer into the more obscure regions of history. The old manner of reckoning from the year of the world, in which congruity was impossible, because there was no agreement upon the point to start from, would certainly be thrown aside; but where is the harm if something better and more certain be substituted in its place? In the third, fourth, fifth, and sixth editions, though the increase in the number of pages is small, yet all those additions and corrections which I deemed necessary, and which the progress of knowledge and discovery, as in the case of Egypt and other countries, enabled me to effect, have been most carefully and fully made. The importance of these will be best seen by comparison. _Goettingen_, 1828. CONTENTS. Page INTRODUCTION 1 Book I. Asiatic and African states previous to Cyrus 15 General geographical outline of Asia ib. Preliminary and General Observations upon the History and Constitution of the great Asiatic Empires 22 History of the ancient Asiatic kingdoms before the reign of Cyrus 25 I. Assyrian monarchy ib. II. Median monarchy 26 III. Babylonian monarchy 27