Without the city were numerous canals, embankments, etc., for the purpose of irrigating the country, which, as little or no rain fell, depended on the river for moisture. ‘The execution of such colossal works as those of Babylon and Egypt,’ it has been remarked, ‘demonstrates habits of regular industry, a concentrated population under one government, and above all, an implicit submission to the regal and kingly sway――contrasted forcibly with the small self-governing communities of Greece and western Europe, where the will of the individual citizen was so much more energetic.’ In the latter countries only such public works were attempted as were within the limits of moderate taste. Nineveh is said to have been larger even than Babylon, and is described as an oblong, three days’ journey round――that is, upwards of 60 miles. THE MEDES AND PERSIANS. Extending, as we have said, from the Mediterranean to the Indus, the Assyrian empire had included not only the chief Semitic nations of western Asia, but also that portion of the Indo-Germanic family which was contained between Mount Zagros and the river Indus. Essentially a prolongation of the great race which inhabited Hindoostan, the nature of their country――a vast table-land, here and there rising into hills, or presenting spots of great fertility――had made them quite different in character and habits from the settled and stereotyped Hindoos. All parts of this plateau of Iran, as it was called, including the present countries of Persia, Cabool, and Belochistan, were not alike; in some portions, where the soil was fertile, there existed a dense agricultural population; in others, the inhabitants were nomadic horse-breeders, cattle-rearers, and shepherds. All the tribes, however, were bound together by the ties of a common Indo-Persic language, quite distinct from that spoken by their Semitic neighbors and masters, and by a common religion. This religion, called the Religion of Zend, a modification probably of some more ancient form, from which Hindooism may also have sprung, was taught by Zerdusht or Zoroaster, a great native reformer and spiritual teacher, who lived six or seven centuries before Christ. The principal doctrine of his religion was that of the existence of two great emanations from the Supreme and perfect Deity――the one a good spirit (Ormuzd), who created man, and fitted him for happiness; the other an evil spirit, named Ahriman, who has marred the beauty of creation by introducing evil into it. Between these two spirits and their adherents there is an incessant struggle for the mastery; but ultimately Ormuzd will conquer, and Ahriman and evil will be banished from the bosom of creation into eternal darkness. The worship annexed to this doctrine was very simple, dispensing with temples or images, and consisting merely of certain solemn rites performed on mountain tops, etc. Fire, and light, and the sun, were worshiped either as symbols or as inferior deities.