Alexandria had one peculiar advantage over all others:--Dinocrates, considering the great scarcity of good water in this country, dug very spacious vaults, which, having communication with all parts of the city, furnished its inhabitants with one of the chief necessaries of life. These vaults were divided into capacious reservoirs, or cisterns, which were filled, at the time of the inundation of the Nile, by a canal cut out of the Canopic branch, entirely for that purpose. The water was, in that manner, preserved for the remainder of the year; and being refined by the long settlement, was not only the clearest, but the wholesomest of any in Egypt. This grand work is still remaining; whence the present city, though built out of the ruins of the ancient one, still enjoys the benefactions of Alexander, its founder. A street[18], two thousand feet wide, began at the Marine gate, and ended at the gate of Canopus, adorned with magnificent houses, temples, and public edifices. Through this extent of prospect the eye was never satiated with admiring the marble, the porphyry, and the obelisks which were destined hereafter to adorn Rome and Constantinople. This street was indeed the finest the world ever saw. Besides all the private buildings constructed with porphyry and marble, there was an admirable temple to Serapis, and another to Neptune; also a theatre, an amphitheatre, gymnasium, and circus. The materials had all the perfection which the experience of one thousand years could afford; and the wealth and exertions, not only of Egypt but of Asia. The place was extensive and magnificent; and a succession of wise and good princes rendered it, by means of Egyptian materials and Grecian taste, one of the richest and most perfect cities the world has ever beheld. The palace occupied one quarter of the city; but within its precincts were a museum, extensive groves, and a temple containing the sepulchre of Alexander. This city was also famous for a temple erected to the God Serapis, in which was a statue which the natives of Sinope (in Pontus) had bartered, in a season of famine, for a supply of corn. The temple was called the Serapion; and Ammianus Marcellinus assures us[19], that it surpassed all the temples then in the world for beauty and magnificence, with the sole exception of the Capitol at Rome. Ptolemy Soter made this city the metropolitan seat of arts and sciences. He founded the museum, the most ancient and most sumptuous temple ever erected by any monarch, in honour of learning; he filled it with men of abilities, and made it an asylum for philosophers of all descriptions, whose doctrines were misunderstood, and whose persons were persecuted; in whose unfeigned tribute of grateful praise he has found a surer road to everlasting renown, than his haughty nameless predecessors, who pretended to immortality, and braved both heaven and corroding time by the solid structure of their pyramids.