Having settled affairs at Opus, he proceeded thence to Thronium. Attalus, too, at first retired from Oreum; but there receiving intelligence that Prusias, king of Bithynia, had invaded his kingdom, he withdrew his attention from the Romans and the Aetolian war, and passed over into Asia. Sulpicius also withdrew his fleet to Aegina, from whence he had set out in the beginning of spring. Philip took Thronium with as little difficulty as Attalus had at Opus. It was inhabited by foreigners, fugitives from Thebes in Phthiotis, who, on the capture of their own town by Philip, had fled to the protection of the Aetolians, and received from them a city as a settlement which had been laid waste and desolated in a former war by the same Philip. Having recovered Thronium, as has been a little before mentioned, he set out thence; and having taken Tritonos and Drymae, inconsiderable towns of Doris, he came thence to Elatia, where he had ordered the ambassadors of Ptolemy and the Rhodians to wait for him. While consulting there as to the best method of bringing the Aetolian war to a conclusion, (for these ambassadors attended the late council of the Romans and Aetolians at Heraclea,) intelligence is brought that Machanidas intended to attack the Elians while busied in preparing for the celebration of the Olympic games. Thinking it his duty to prevent such an attempt, he dismissed the ambassadors with a gracious answer to the effect, that he had neither caused the war, nor would he be any obstacle to the restoration of peace, if it should be possible on equitable and honourable terms; then marching quickly through Boeotia he came down from Megara, and thence to Corinth, where receiving supplies of provisions, he went to Phlius and Pheneus. And now, when he had proceeded as far as Heraea, having received intelligence that Machanidas, terrified at the news of his approach, had retreated to Lacedaemon, he betook himself to Aegium, where the Achaeans were assembled in council, expecting at the same time to meet there a Carthaginian fleet, which he had sent for, in order that he might accomplish something by sea. But the Carthaginians had left a few days before, and were gone to the Oxean islands; and thence, hearing that the Romans and Attalus had left Oreum, to the harbours of the Acarnanians, for they feared that it was intended to attack them, and that they would be overpowered while within the straits of Rhium, which is the name of the entrance of the Corinthian bay.