With the Deluge the mythical history of Babylonia takes a new departure. From this event to the Persian conquest was a period of 36,000 years, or an astronomical cycle called _saros_. Xisuthros, with his family and friends, alone survived the waters which drowned the rest of mankind on account of their sins. He had been ordered by the gods to build a ship, to pitch it within and without, and to stock it with animals of every species. Xisuthros sent out first a dove, then a swallow, and lastly a raven, to discover whether the earth was dry; the dove and the swallow returned to the ship, and it was only when the raven flew away that the rescued hero ventured to leave his ark. He found that he had been stranded on the peak of the mountain of Nizir, "the mountain of the world," whereon the Accadians believed the heavens to rest--where, too, they placed the habitations of their gods, and the cradle of their own race. Since Nizir lay amongst the mountains of Pir Mam, a little south of Rowandiz, its mountain must be identified with Rowandiz itself. On its peak Xisuthros offered sacrifices, piling up cups of wine by sevens; and the rainbow, "the glory of Anu," appeared in the heaven, in covenant that the world should never again be destroyed by flood. Immediately afterwards Xisuthros and his wife, like the Biblical Enoch, were translated to the regions of the blest beyond Datilla, the river of Death, and his people made their way westward to Sippara. Here they disinterred the books buried by their late ruler before the Deluge took place, and re-established themselves in their old country under the government first of Erekhoos, and then of his son Khoniasbolos. Meanwhile, other colonists had arrived in the plain of Sumer, and here, under the leadership of the giant Etana, called Titan by the Greek writers, they built a city of brick, and essayed to erect a tower by means of which they might scale the sky, and so win for themselves the immortality granted to Xisuthros... But the tower was overthrown in the night by the winds, and Bel frustrated their purpose by confounding their language and scattering them on the mound. These legends of the Flood and the Tower of Babel were obviously borrowed by the Jews during their Babylonian captivity. Professor Sayce, in his _Ancient Empires of the East_, speaking of the Accadian king, Sargon I., says: