Plutarch, Cimon
Bernadotte Perrin, Ed.

When the enemy's land forces marched threateningly down to the sea, Cimon thought it a vast undertaking to force a landing and lead his weary Hellenes against an unwearied and many times more numerous foe. But he saw that his men were exalted by the impetus and pride of their victory, and eager to come to close quarters with the Barbarians, so he landed his hoplites still hot with the struggle of the sea-fight, and they advanced to the attack with shouts and on the run. [2] The Persians stood firm and received the onset nobly, and a mighty battle ensued, wherein there fell brave men of Athens, who were foremost in public office and eminent. But after a long struggle the Athenians routed the Barbarians with slaughter and then captured them and their camp, which was full of all sorts of treasure. [3]

But Cimon, though like a powerful athlete he had brought down two contests in one day, and though he had surpassed the victory of Salamis with an infantry battle, and that of Plataea with a naval battle, still went on competing with his own victories. Hearing that the eighty Phoenician triremes which were too late for the battle had put in at Hydrus,¹ he sailed thither with all speed, while their commanders as yet knew nothing definite about the major force, but were still in distrustful suspense. [4] For this reason they were all the more panic-stricken at his attack, and lost all their ships. Most of their crews were destroyed with the ships. This exploit so humbled the purpose of the King that he made the terms of that notorious peace, by which he was to keep away from the Hellenic sea-coast as far as a horse could travel in a day, and was not to sail west of the Cyanean and Chelidonian isles with armored ships of war. [5]

And yet Callisthenes denies that the Barbarian made any such terms, but says he really acted as he did through the fear which that victory inspired, and kept so far aloof from Hellas that Pericles with fifty, and Ephialtes with only thirty, ships sailed beyond the Chelidonian isles without encountering any navy of the Barbarians. [6] But in the decrees collected by Craterus there is a copy of the treaty in its due place, as though it had actually been made. And they say that the Athenians also built the altar of Peace to commemorate this event, and paid distinguished honors to Callias as their ambassador.

By the sale of the captured spoils the people was enabled to meet various financial demands, and especially it constructed the southern wall of the Acropolis with the generous resources obtained from that expedition. [7] And it is said that, though the building of the long walls, called ‘legs,’ was completed afterwards, yet their first foundations, where the work was obstructed by swamps and marshes, were stayed up securely by Cimon, who dumped vast quantities of rubble and heavy stones into the swamps, meeting the expenses himself. [8] He was the first to beautify the city with the so-called ‘liberal’ and elegant resorts which were so excessively popular a little later, by planting the market-place with plane trees, and by converting the Academy from a waterless and arid spot into a well watered grove, which he provided with clear running-tracks and shady walks.