Pausanias Description of Greece 1.6.6

[6] When the winter was over, Demetrius sailed to Cyprus and overcame in a naval action Menelaus, the satrap of Ptolemy, and afterwards Ptolemy him self, who had crossed to bring help. Ptolemy fled to Egypt , where he was besieged by Antigonus on land and by Demetrius with a fleet. In spite of his extreme peril Ptolemy saved his empire by making a stand with an army at Pelusium while offering resistance with warships from the river. Antigonus now abandoned all hope of reducing Egypt in the circumstances, and dispatched Demetrius against the Rhodians with a fleet and a large army, hoping, if the island were won, to use it as a base against the Egyptians. But the Rhodians displayed daring and ingenuity in the face of the besiegers, while Ptolemy helped them with all the forces he could muster.

[6] When the winter was over, Demetrios sailed to Cyprus and overcame in a naval action Menelaos, 34

the satrap of Ptolemy, and afterwards Ptolemy himself, who had crossed over to bring help. Ptolemy fled to Egypt, where he was besieged by Antigonos on land and by Demetrios with a fleet. In spite of his extreme peril Ptolemy saved his empire [ arkhē] by making a stand with an army at Pēlousion while offering resistance with warships from the river. Antigonos now abandoned all hope of reducing Egypt, under the circumstances, and dispatched Demetrios against the Rhodians with a fleet and a large army, hoping, if the island were won, to use it as a base against the Egyptians. But the Rhodians displayed daring and ingenuity in the face of the besiegers, while Ptolemy helped them with all the forces he could muster.