49 Now that we have completed the account of events in Asia, we shall turn our attention to Europe and set forth what took place there following the events previously described. Although Cassander had shut Olympias into Pydna in Macedonia, he was not able to assault the walls because of the winter storms, but by encamping about the city, throwing up a palisade from sea to sea, and blockading the port, he prevented any who might wish to aid the queen from doing so. 2 And as supplies were rapidly exhausted, he created such famine among those within that they were completely incapacitated. In truth, they were brought to such extreme need that they gave each soldier five choenices of grain per month, sawed up wood and fed the sawdust to the imprisoned elephants, and slaughtered the pack animals and horses for food. 3 While the situation of the city was so serious and while Olympias was still clinging to hopes of rescue from outside, the elephants died from lack of nourishment, the horsemen that were not in the ranks and did not receive any food whatever nearly all perished, and no small number of the soldiers also met the same fate. 4 Some of the non-Greeks, their natural needs overcoming their scruples, found flesh to eat by collecting the bodies of the dead. Since the city was being quickly filled with corpses, those in charge of the queen's company, though they buried some of the bodies, threw others over the city wall. The sight of these was horrible, and their stench was unbearable, not merely to ladies who were of the queen's court and addicted to luxury, but also to those of the soldiers who were habituated to hardship.
50 As spring came on and their want increased from day to day, many of the soldiers gathered together and appealed to Olympias to let them go because of the lack of supplies. Since she could neither issue any food at all nor break the siege, she permitted them to withdraw. 2 Cassander, after welcoming all the deserters and treating them in most friendly fashion, sent them to the various cities; for he hoped that when the Macedonians learned from them how weak Olympias was, they would despair of her cause. 3 And he was not mistaken in his surmise about what would happen: those who had resolved to fight on the side of the besieged forces changed their minds and went over to Cassander; and the only men in Macedonia to preserve their loyalty were Aristonoüs and Monimus, of whom Aristonoüs was ruler of Amphipolis and Monimus of Pella. 4 But Olympias, when she saw that most of her friends had gone over to Cassander and that those who remained were not strong enough to come to her aid, attempted to launch a quinquereme and by this means to save herself and her friends. 5 When, however, a deserter brought news of this attempt to the enemy and Cassander sailed up and took the ship, Olympias, recognizing that her situation was beyond hope, sent envoys to treat of terms. When Cassander gave his opinion that she must put all her interests into his hands, she with difficulty persuaded him to grant the single exception that he guarantee her personal safety. 6 As soon as he had gained possession of the city, he sent men to take over Pella and Amphipolis. 7 Now Monimus, the ruler of Pella, on hearing the fate of Olympias, surrendered his city; but Aristonoüs at first was minded to cling to his position, since he had many soldiers and had recently enjoyed a success. That is, a few days before this in a battle against Cassander's general Cratevas he had killed most of those who faced him, and when Cratevas himself with two thousand men had fled to Bedyndia in Bisaltia, he invested him, took him by siege, and dismissed him on terms after taking away his arms. 8 Aristonoüs, encouraged by this and ignorant of the death of Eumenes, believing, moreover, that Alexander and Polyperchon would support him, refused to surrender Amphipolis. But when Olympias wrote to him demanding his loyalty and ordering him to surrender, he perceived that it was necessary to do as ordered and delivered the city to Cassander, receiving pledges for his own safety.
51 Cassander, seeing that Aristonoüs was respected because of the preferment he had received from Alexander, and being anxious to put out of the way any who were able to lead a revolt, caused his death through the agency of the kinsfolk of Cratevas.
Diodoros Book XIX 49ff ; He had defeated Kassander's forces and, given that the relatives of Kratevas wanted him dead had presumably not just released him on parole. It is more likely that Kassander could see his turn of coat was insincere and so dealt pre-emptively with a prospective problem, Hieronymos likes to paint Kassander as an enemy of Alexander even after the grave, the preferment may have made him superficially popular in macedon but it is his evident faux-loyaute that sealed his Fate IMHO.