Themistocles, being desirous to try the opinion of Aristides, told him that he proposed to set sail for the Hellespont, to break the bridge of ships, so as to shut up, he said, Asia a prisoner within Europe; but Aristides, disliking the design, said, "We have hitherto fought with an enemy who has regarded little else but his pleasure and luxury; but if we shut him up within Greece, and drive him to necessity, he that is master of such great forces will no longer sit quietly with an umbrella of gold over his head, looking upon the fight for his pleasure; but in such a strait will attempt all things; he will be resolute, and appear himself in person upon all occasions, he will soon correct his errors, and supply what he has formerly omitted through remissness, and will be better advised in all things. Therefore, it is noways our interest, Themistocles," he said, "to take away the bridge that is already made, but rather to build another, if it were possible, that he might make his retreat with the more expedition." To which Themistocles answered, "If this be requisite, we must immediately use all diligence, art, and industry, to rid ourselves of him as soon as may be;" and to this purpose he found out among the captives one of the king Of Persia's eunuchs, named Arnaces, whom he sent to the king, to inform him that the Greeks, being now victorious by sea, had decreed to sail to the Hellespont, where the boats were fastened together, and destroy the bridge; but that Themistocles, being concerned for the king, revealed this to him, that he might hasten towards the Asiatic seas, and pass over into his own dominions; and in the mean time would cause delays, and hinder the confederates from pursuing him. Xerxes no sooner heard this, but, being very much terrified, he proceeded to retreat out of Greece with all speed. The prudence of Themistocles and Aristides in this was afterwards more fully understood at the battle of Plataea, where Mardonius, with a very small fraction of the forces of Xerxes, put the Greeks in danger of losing all.