But the widest, as well as the most sudden, enlargement of the horizon was due to a rapid succession of discoveries, some the result of persevering searches and lucky excavations, others rendered possible by feats of induction which almost amounted to genius. It seemed as though a curtain were drawn up, and, behind the rich and brilliant scenery of Græco-Roman civilization, the real ancient world, the world of the East, the father of religions and of useful inventions, of the alphabet and of the plastic arts, were suddenly revealed to us. The great work which was compiled by the _savants_ who accompanied Bonaparte to Egypt first introduced the antiquities of that country to us, and not long afterwards Champollion discovered the key to the hieroglyphics, and thus enabled us to assign to the monuments of the country at least a relative date. A little later Layard and Botta freed Nineveh from the ruins of its own buildings, and again let in the light upon ancient Assyria. But yesterday we knew nothing beyond the names of its kings, and yet it sprang again to the day, its monuments in marvellous preservation, its history pictured by thousands of figures in relief and narrated by their accompanying inscriptions. These did not long keep their secrets to themselves, and their interpretation enables us to classify chronologically the works of architecture and sculpture which have been discovered. The information thus obtained was supplemented by careful exploration of the ruins in Babylonia, lower Chaldæa, and Susiana. These had been less tenderly treated by time and by man than the remains of Nineveh. The imposing ruins of the palace at Persepolis and of the tombs of the kings, had been known for nearly two centuries, but only by the inadequate descriptions and feeble drawings of early travellers. Ker-Porter, Texier, and Flandrin provided us with more accurate and comprehensive descriptions, and, thanks to their careful copies of the writings upon the walls of those buildings, and upon the inscribed stones of Persia and Media, Eugène Burnouf succeeded in reconstructing the alphabet of Darius and Xerxes.