After the study of Astronomy was set on foot for the use of navigation, and the _Egyptians_ by the Heliacal Risings and Settings of the Stars had determined the length of the Solar year of 365 days, and by other observations had fixed the Solstices, and formed the fixt Stars into Asterisms, all which was done in the Reign of _Ammon_, _Sesac_, _Orus_, and _Memnon_; it may be presumed that they continued to observe the motions of the Planets; for they called them after the names of their Gods; and _Nechepsos_ or _Nicepsos_ King of _Sais_, by the assistance of _Petosiris_ a Priest of _Egypt_, invented Astrology, grounding it upon the aspects of the Planets, and the qualities of the men and women to whom they were dedicated: and in the beginning of the Reign of _Nabonassar_ King of _Babylon_, about which time the _Ethiopians_ under _Sabacon_ invaded _Egypt_, those _Egyptians_ who fled from him to _Babylon_, carried thither the _Egyptian_ year of 365 days, and the study of Astronomy and Astrology, and founded the _Æra_ of _Nabonassar_; dating it from the first year of that King's Reign, which was the 22d year _of Bocchoris_ as above, and beginning the year on the same day with the _Egyptians_ for the sake of their calculations. So _Diodorus_ [337]: _they say that the _Chaldæans_ in _Babylon_, being Colonies of the _Egyptians_, became famous for Astrology, having learnt it from the Priests of _Egypt__: and _Hestiæus_, who wrote an history of _Egypt_, speaking of a disaster of the invaded _Egyptians_, saith [338] that _the Priests who survived this disaster, taking with them the _Sacra_ of _Jupiter Enyalius_, came to _Sennaar_ in _Babylonia__. From the 15th year of _Asa_, in which _Zerah_ was beaten, and _Menes_ or _Amenophis_ began his Reign, to the beginning of the _Æra_ of _Nabonassar_, were 200 years; and this interval of time allows room for about nine or ten Reigns of Kings, at about twenty years to a Reign one with another; and so many Reigns there were, according to the account set down above out of _Herodotus_; and therefore that account, as it is the oldest, and was received by _Herodotus_ from the Priests of _Thebes_, _Memphis_, and _Heliopolis_, three principal cities of _Egypt_, agrees also with the course of nature, and leaves no room for the Reigns of the many nameless Kings which we have omitted. These omitted Kings Reigned before _Mœris_, and by consequence at _Thebes_; for _Mœris_ translated the seat of the Empire from _Thebes_ to _Memphis_: they Reigned after _Ramesses_; for _Ramesses_ was the son and successor of _Menes_, who Reigned next after the Gods. Now _Menes_ built the body of the Temple of _Vulcan_, _Ramesses_ the first portico, and _Mœris_ the second portico thereof; but the _Egyptians_, for making their Gods and Kingdom look ancient, have inserted between the builders of the first and second portico of this Temple, three hundred and thirty Kings of _Thebes_, and supposed that these Kings Reigned eleven