History of the Peloponnesian War

After having rewarded him with a present of money, as soon as he received some from his friends at Athens and from his secret hoards at Argos, Themistocles started inland with one of the Coast-Persians, and sent a letter to King Artaxerxes, Xerxes' son, who had just come to the throne.

Its contents were as follows: ‘I, Themistocles, am come to you, who did your house more harm than any of the Hellenes, when I was compelled to defend myself against your father's invasion,—harm, however, far surpassed by the good that I did him during his retreat, which brought no danger for me but much for him. For the past, you are a good turn in my debt,’—here he mentioned the warning sent to Xerxes from Salamis to retreat, as well as his finding the bridges unbroken, which, as he falsely pretended, was due to him,—‘for the present, able to do you great service, I am here, pursued by the Hellenes for my friendship for you. However, I desire a year's grace, when I shall be able to declare in person the objects of my coming.’

It is said that the king approved his intention, and told him to do as he said. He employed the interval in making what progress he could in the study of the Persian tongue, and of the customs of the country.

Arrived at Court at the end of the year, he attained to very high consideration there, such as no Hellene has ever possessed before or since; partly from his splendid antecedents, partly from the hopes which he held out of effecting for him the subjugation of Hellas, but principally by the proof which experience daily gave of his capacity.