PERSIAN DOCTRINE OF A FUTURE LIFE. THE name of Zoroaster is connected, either as author or as reviser, with that remarkable system of rites and doctrines which constituted the religion of the ancient Iranians, and which yet finds adherents in the Ghebers of Persia and the Parsees of India. Pliny, following the affirmation of Aristotle, asserts that he flourished six thousand years before Plato. Moyle, Gibbon, Volney, Rhode, concur in throwing him back into this vast antiquity. Foucher, Holty, Heeren, Tychsen, Guizot, assign his birth to the beginning of the seventh century before Christ. Hyde, Prideaux, Du Perron, Kleuker, Herder, Klaproth, and others, bring him down to about a hundred and fifty years later. Meanwhile, several weighty names press the scale in favor of the hypothesis of two or three Zoroasters, living at separate epochs. So the learned men differ, and the genuine date in question cannot, at present at least, be decided. It is comparatively certain that, if he was the author of the work attributed to him, he must have flourished as early as the sixth century before Christ. The probabilities seem, upon the whole, that he lived four or five centuries earlier than that, even, "in the pre historic time," as Spiegel says. However, the settlement of the era of Zoroaster is not a necessary condition of discovering the era when the religion commonly traced to him was in full prevalence as the established faith of the Persian empire. The latter may be conclusively fixed without clearing up the former. And it is known, without disputation, that that religion whether it was primarily Persian, Median, Assyrian, or Chaldean was flourishing at Babylon in the maturity of its power in the time of the Hebrew prophets Ezekiel, Jeremiah, and Daniel, twenty five hundred years ago. The celebrated work on the religion of the ancient Medes and Persians by Dr. Hyde, published in 1700, must be followed with much caution and be taken with many qualifications. The author was biassed by unsound theories of the relation of the Hebrew theology to the Persian, and was, of course, ignorant of the most authoritative ancient documents afterwards brought to light. His work, therefore, though learned and valuable, considering the time when it was written, is vitiated by numerous mistakes and defects. In 1762, Anquetil du Perron, returning to France from protracted journeying and abode in the East, brought home, among the fruits of his researches, manuscripts purporting to be parts of the old Persian Bible composed or collected by Zoroaster. It was written in a language hitherto unknown to European scholars, one of the primitive dialects of Persia. This work, of which he soon published a French version at Paris was entitled by him the "Zend Avesta." It confirmed all that was previously known of the Zoroastrian religion, and, by its allusions, statements, and implications, threw great additional light upon the subject.