Berosus (Chald.). A priest of the Temple of Belus who wrote for Alexander the Great the history of the Cosmogony, as taught in the Temples, from the astronomical and chronological records preserved in that temple. The fragments we have in the soi-disant translations of Eusebius are certainly as untrustworthy as the biographer of the Emperor Constantine—of whom he made a saint (!!)—could make them. The only guide to this Cosmogony may now be found in the fragments of the Assyrian tablets, evidently copied almost bodily from the earlier Babylonian records; which, say what the Orientalists may, are undeniably the originals of the Mosaic Genesis, of the Flood, the tower of Babel, of baby Moses set afloat on the waters, and of other events. For, if the fragments from the Cosmogony of Berosus, so carefully re-edited and probably mutilated and added to by Eusebius, are no great proof of the antiquity of these records in Babylonia—seeing that this priest of Belus lived three hundred years after the Jews were carried captive to Babylon, and they may have been borrowed by the Assyrians from them—later discoveries have made such a consoling hypothesis impossible. It is now fully ascertained by Oriental scholars that not only “Assyria borrowed its civilization and written characters from Babylonia,” but the Assyrians copied their literature from Babylonian sources. Moreover, in his first Hibbert lecture, Professor Sayce shows the culture both of Babylonia itself and of the city of Eridu to have been of foreign importation; and, according to this scholar, the city of Eridu stood already “6,000 years ago on the shores of the Persian gulf,” i.e., about the very time when Genesis shows the Elohim creating the world, sun, and stars out of nothing.
Source: H.P.Blavatsky - The Theosophical Glossary