Plutarch, Demetrius
Bernadotte Perrin, Ed.

31. Be that as it may, in this case Demetrius thought himself grievously wronged; but since he was unable to avenge himself, he sent a message to the Athenians in which he mildly expostulated with them, and asked that his ships be given back to him, among which was also the one having thirteen banks of oars. These he obtained, and then coasted along to the Isthmus, where he found his affairs in a sorry state. For his garrisons were everywhere being expelled, and there was a general defection to his enemies. [2] He therefore left Pyrrhus in charge of Greece, while he himself put to sea and sailed to the Chersonesus.¹ Here he ravaged the territory of Lysimachus, thereby enriching and holding together his own forces, which were beginning to recover their spirit and to show themselves formidable again. Nor did the other kings try to help Lysimachus; they thought that he was no less objectionable than Demetrius, and that because he had more power he was even more to be feared.

[3] Not long afterwards, however, Seleucus sent and asked the hand of Stratonicé, the daughter of Demetrius and Phila, in marriage. He had already, by Apama the Persian, a son Antiochus; but he thought that his realms would suffice for more successors than one, and that he needed this alliance with Demetrius, since he saw that Lysimachus also was taking one of Ptolemy's daughters for himself, and the other for Agathocles his son. [4] Now, to Demetrius, a marriage alliance with Seleucus was an unexpected piece of good fortune. So he took his daughter and sailed with his whole fleet to Syria. He was obliged to touch at several places along the coast, and made landings in Cilicia, which country had been allotted by the kings to Pleistarchus, after their battle with Antigonus, and was now held by him. Pleistarchus was a brother of Cassander. [5] He thought his territories outraged by these descents of Demetrius upon them, and besides, he wished to upbraid Seleucus for making an alliance with the common enemy independently of the other kings. So he went up to see him.