Alexander, the Macedonian, died in the CXIVth Olympiad, after a reign of 12 years in the whole: and was succeeded in his kingdom by Aridaeus, whose name was changed to Philip, being brother to Alexander, by another mother; for he was the son of Philip by Philinna of Larissa: and after a reign of seven years, he was killed in Macedonia, by Polysperchon the son of Antipater. Now Ptolemy the son of Arsinoe and of Lagus, after one year of this reign, by an appointment derived from Philip, was sent as a Satrap into Egypt; which he governed in this capacity for 17 years, and afterwards, with Royal authority, for 23; so that the number of all the years of his government, to the time of his death, became 40; but since he retired from the government two years before, in favour of his son Ptolemy Philadelphus, and considered himself as a subject of his son, who had been crowned in his place, the years of this first Ptolemy, called Soter, are reckoned not 40, but 38 only. He was succeeded by his son, surnamed, as already mentioned, Philadelphus, who reigned two years during his fathers’ life, and thirty [six] afterwards, so that his whole reign occupied, like his father’s, 38 years. In the third place, the throne was ascended by Ptolemy surnamed Evergetes, who reigned 25 years. In the fourth by Ptolemy called Philopator, whose reign was in the whole 17 years. After him, the fifth Ptolemy was surnamed Epiphanes, and reigned 24 years. Epiphanes had two sons, both named Ptolemy, who reigned after him; the elder was surnamed Philometor, and the younger Evergetes the second; their reigns together occupy a period of 64 years. We have placed this as a single number, because, as they were at variance with each other, and reigned alternately, the dates were necessarily confounded. For Philometor first reigned eleven years alone; but when Antiochus made war upon Egypt, and deprived him of his crown, the Alexandrians committed the government to the charge of his younger brother; and, having driven back Antiochus, set Philometor at liberty. They then numbered the year the [twelfth] of Philometor and the first of Evergetes; and this system was continued till the seventeenth: but from the eighteenth forwards, the years are attributed to Philometor alone.