When Philometor quitted the island of Cyprus after beating his brother in battle, he left Archias as governor, who entered into a plot to give it up to Demetrius, King of Syria, for the sum of five hundred talents.  But the plot was found out, and the traitor then put an end to his own life, to escape from punishment and self-reproach.  By this treachery of Demetrius, Philometor was made his enemy, and he joined Attalus, King of Pergamus, and Ariarathes, King of Cappadocia, in setting up Alexander Balas as a pretender to the throne of Syria, who beat Demetrius in battle, and put him to death.  Philometor two years afterwards gave his elder daughter, Cleopatra, in marriage to Alexander, and led her himself to Ptolemais, or Acre, where the marriage was celebrated with great pomp.

But even in Ptolemais, the city in which Alexander had been so covered with favours, Philometor was near falling under the treachery of his new son-in-law.  He learned that a plot had been formed against his life by Ammonius, and he wrote to Alexander to beg that the traitor might be given up to justice.  But Alexander acknowledged the plot as his own, and refused to give up his servant.  On this, Philometor recalled his daughter, and turned against Alexander the forces which he had led into Syria to uphold him.  He then sent to the young Demetrius, afterwards called Nicator, the son of his late enemy, to offer him the throne and wife which he had lately given to Alexander Balas.  Demetrius was equally pleased with the two offers.  Philometor then entered Antioch at the head of his army, and there he was proclaimed by the citizens King of Asia and Egypt; but with a forbearance then very uncommon, he called together the council of the people, and refused the crown, and persuaded them to receive Demetrius as their king.

[Illustration:  237.jpg COIN OF PTOLEMY V.]

It is interesting to note that Alexander Balas and Demetrius Nicator each in his turn acknowledged his debt to the King of Egypt by putting the Ptolemaic eagle on his coins, and adjusting them to the Egyptian standard of weight:  and in this they were afterwards followed by Antiochus, the son of Demetrius.  The Romans, on the other hand, sometimes used the same eagle in boast of their power over Egypt; but we cannot be mistaken in what was meant by these Syrian kings, who none of them, when their coins were struck, were seated safely on the throne.  With them, as with some of the Greek cities of Asia Minor, the use of the Egyptian eagle on the coins was an act of homage.

Philometor and Demetrius, as soon as the latter was acknowledged king at Antioch, then marched against Alexander, routed his army, and drove him into Arabia.  But in this battle Philometor’s horse was frightened by the braying of an elephant, and threw the king into the ranks of the enemy, and he was taken up covered with wounds.  He lay speechless for five days, and the surgeons then endeavoured to cut out a piece of the broken bone from his skull.  He died under the operation:  but not before the head of Alexander had been brought to him as the proof of his victory.