Research Notes:

At some moment in the course of his war with the Seleucid Power [the Egyptian king] Ptolemy Euergetes had taken prisoner a person of very high standing indeed, Andromachus, the father of Achaeus.... When Ptolemy Euergetes died, Andromachus was still a prisoner in Egypt. Since Achaeus had long shown great anxiety to secure his father's release, Sosibius naturally regarded the captive Macedonian grandee as a very valuable piece to play in the political game. He had, perhaps, before the revolt of Achaeus, tried to strike a bargain with him—the release of Andromachus as the price of Achaeus deserting the Seleucid cause. When Achaeus had once revolted, pushed by other circumstances, and without having made any compact with Egypt, there was the less reason to let Andromachus go. Sosibius was, indeed, very unwilling to part with such a valuabl asset. However, the Rhodians now exerted themselves zealously as intercessors on behalf of Achaeus, and when Rhodes desired anything strongly, Alexandria was likely to be accommodating. Andromachus was delivered over to the Rhodians, who escorted him back to Asia Minor. ²