It was probably the fear of an invasion by the tribes of Syria that led Rameses to reduce to a position of grinding servitude the Semitic peoples that under former dynasties had been permitted to settle in Lower Egypt; for this Nineteenth Dynasty, to which Rameses II. belongs, was the new king (dynasty) that arose "which knew not Joseph" (Ex. i. 8), and oppressed the children of Israel. It was during the reign of his son Menephtha that the Exodus took place (about 1300 B.C.). [Illustration: RAMESES II. RETURNING IN TRIUMPH FROM SYRIA, with his chariot garnished with the heads of his enemies. (From the monuments of Karnak.)] THE TWENTY-SIXTH DYNASTY (666-527 B.C.).--We pass without comment a long period of several centuries, marked, indeed, by great vicissitudes in the fortunes of the Egyptian monarchs, yet characterized throughout by a sure and rapid decline in the power and splendor of their empire. During the latter part of this period Egypt was tributary to Assyria. But about 666 B.C., a native prince, Psammetichus I. (666-612 B.C.), with the aid of Greek mercenaries from Asia Minor, succeeded in expelling the Assyrian garrisons. Psammetichus thus became the founder of the Twenty- sixth Dynasty. The reign of this monarch marks a new era in Egyptian history. Hitherto Egypt had secluded herself from the world, behind barriers of jealousy, race, and pride. But Psammetichus being himself, it seems, of non-Egyptian origin, and owing his throne chiefly to the swords of Greek soldiers, was led to reverse the policy of the past, and to throw the valley open to the commerce and influences of the world. His capital, Sais, on the Canopic branch of the Nile, forty miles from the Mediterranean, was filled with Greek citizens; and Greek mercenaries were employed in his armies. This change of policy, occurring at just the period when the rising states of Greece and Rome were shaping their institutions, was a most significant event. Egypt became the University of the Mediterranean nations. From this time forward Greek philosophers, as in the case of Pythagoras and of Plato, are represented as becoming pupils of the Egyptian priests; and without question the learning and philosophy of the ancient Egyptians exerted a profound influence upon the quick, susceptible mind of the Hellenic race, that was, in its turn, to become the teacher of the world. The liberal policy of Psammetichus, while resulting in a great advantage to foreign nations, brought a heavy misfortune upon his own. Displeased with the position assigned Greek mercenaries in the army, the native Egyptian soldiers revolted, and two hundred thousand of the troops seceding in a body, emigrated to Ethiopia, whence no inducement that Psammetichus offered could persuade them to return.