In the same year, the tenth of its siege, Ithome surrendered to the Spartans. So long and brave a defense won the respect even of bitter enemies. The Helots were reduced again to slavery, but the Messenians were permitted to depart in safety to Naupactus, which Tolmides presented them from the fruits of his victories. =149.= In Egypt, the resistance of the Athenians to the Persians ended the same year, but not until after long and desperate adventures. When the citadel of Memphis was relieved by a Persian force, the Greeks withdrew to Prosopi´tis, an island in the Nile around which their ships lay anchored. The Persians following, drained the channel, and thus left the ships on dry land. The Egyptian allies yielded, on this loss of their most effective force; but the Athenians, after burning the stranded vessels, retired into the town of Byblus, resolved to hold out to the last. The siege continued eighteen months. At last the Persians marched across the dry bed of the channel and took the place by assault. Most of the Athenians fell; a few crossed the Libyan desert to Cyrene, and thus returned home. A fleet of fifty vessels, which had been sent to their relief, came too late, and was defeated by the Persians and Phœnicians. [Sidenote: B. C. 449.] =150.= Other enterprises of the Athenians at this time were scarcely more successful, and Cimon, who had now been recalled from exile, used all his influence in favor of peace. A five years’ truce was made with Sparta in 451 B. C. The Isle of Cyprus was the next object of Athenian ambition. Divided into nine petty states, it seemed to offer an easy conquest; and as the Persian king still claimed the sovereignty, the enterprise was but a renewal of ancient hostilities. Cimon sailed from Athens with a fleet of two hundred vessels; and in spite of the Persian force of three hundred ships which guarded the coast of Cyprus, he landed and gained possession of many of its towns. While besieging Citium the great commander died. By his orders his death was concealed from his men, until they had gained another signal victory, both by land and sea, in his name. The naval battle occurred off the Cyprian Salamis—a name of good omen to the Athenians. [Sidenote: B. C. 448.]