Polysperchon, on his side, sought to conciliate the friendship of the Grecian states, by proclaiming them all free and independent, and by abolishing the oligarchies which had been set up by Antipater. In order to enforce these measures, Polysperchon prepared to march into Greece, whilst his son Alexander was despatched beforehand with an army towards Athens to compel the Macedonian garrison under the command of Nicanor to evacuate Munychia. Nicanor, however, refused to move without orders from Cassander, whose general he declared himself to be. Phocion was suspected of intriguing in favour of Nicanor, and being accused of treason, fled to Alexander, now encamped before the walls of Athens. Alexander sent Phocion to his father, who sent him back to Athens in chains, to be tried by the Athenian people. The theatre, where his trial was to take place, was soon full to overflowing. Phocion was assailed on every side by the clamours of his enemies, which prevented his defence; from being heard, and he was condemned to death by a show of hands. To the last Phocion maintained his calm and dignified, but somewhat contemptuous bearing. When some wretched man spat upon him as he passed to the prison, "Will no one," said he, "check this fellow's indecency?" To one who asked him whether he had any message to leave for his son Phocus, he answered, "Only that he bear no grudge against the Athenians." And when the hemlock which had been prepared was found insufficient for all the condemned, and the jailer would not furnish more unless he was paid for it, "Give the man his money," said Phocion to one of his friends, "since at Athens one cannot even die for nothing." He died in B.C. 317, at the age of 85. The Athenians afterwards repented of their conduct towards Phocion. His bones, which had been cast out on the frontiers of Megara, were brought back to Athens, and a bronze statue was erected to his memory. Whilst Alexander was negotiating with Nicanor about the surrender of Munychia, Cassander arrived in the Piraeus with a considerable army, with which Antigonus had supplied him. Polysperchon was obliged to retire from Athens, and Cassander established an oligarchical government in the city under the presidency of Demetrius of Phalerus. Although Polysperchon was supported by Olympias, the mother of Alexander the Great, he proved no match for Cassander, who became master of Macedonia after the fall of Pydna in B.C. 316. In this city Olympias had taken refuge together with Roxana and her son; but after a blockade of some months it was obliged to surrender. Olympias had stipulated that her life should be spared, but Cassander soon afterwards caused her to be murdered, and kept Roxana and her son in custody in the citadel of Amphipolis. Shortly afterwards Cassander began the restoration of Thebes (B.C. 315), in the twentieth year after its destruction by Alexander, a measure highly popular with the Greeks.