His murderer was his son-in-law, a certain Ptolemy, who was governor of the Jordan Valley, the resources of which had been developed under Simon. Ptolemy trusted to the support of the Syrian court, but he failed to reckon with two things: (1) the loyalty of the people to their Maccabean leaders; and (2) the ability of Simon's son, John Hyrcanus. Instead of falling a victim to Ptolemy's plot, John at once went to Jerusalem where he was made the high priest and governor by the people. Ptolemy, who was besieged in the castle of Dok, saved his miserable life only by shameless perfidy. II. The Syrian Invasion. Antiochus Sidetes proved the ablest Syrian king of this period. Although his first attack had been repelled by Simon, he again attempted, on the accession of Hyrcanus, to reestablish his authority in Palestine. Josephus, in his account, obscures this humiliating chapter in Jewish history. The statement that Hyrcanus took from the tomb of David vast wealth and thus purchased immunity from Syrian attack has all the characteristics of an Oriental tale. Instead, Antiochus Sidetes not only besieged but captured Jerusalem, and doubtless compelled the Jews to pay heavy tribute. Preferring, however, to retain their loyalty rather than to crush them, he left John Hyrcanus in control of Judea, and Jerusalem escaped destruction. In the disastrous campaign against the Parthians in which Antiochus lost his life John Hyrcanus accompanied him with a following of Jewish soldiers. The death of Antiochus Sidetes in 129 B.C. at last left the Jews free to develop their kingdom without further fear of Syrian interference. This event marks for the Jews the attainment of absolute political freedom--a privilege which they continued to enjoy for a little over half a century.