scrupulous about the means that he employed for these ends, he came into frequent conflict with Aristides the Just, who had nothing at heart but the welfare of his country and no desire for personal aggrandizement. In the year 483 B.C., when Aristides was sent into exile by ostracism, Themistocles, who had for several years taken an active part in public affairs, and was one of the chief authors of the banishment of his rival, remained in the almost undivided possession of the popular favor, and the year after, B.C. 482, he was elected archon eponymus of Athens. The city was at that time involved in a war with AEgina, which then possessed the strongest navy in Greece, and with which Athens was unable to cope. It was in this year that Themistocles conceived and partly carried into effect the plans by which he intended to raise the power of Athens. His first object was to increase the navy of Athens; and this he did ostensibly to enable Athens to contend with AEgina, but his real intention was to put his country in a position to meet the danger of a second Persian invasion, with which Greece was threatened. The manner in which he raised the naval power was this. Hitherto the people of Athens had been accustomed to divide among themselves the yearly revenues of the silver-mines of Laurion. In the year of his archonship these revenues were unusually large, and he persuaded his countrymen to forego their personal advantage, and to apply these revenues to the enlargement of their fleet. His advice was followed, and the fleet was raised to the number of two hundred sail. It was probably at the same time that he induced the Athenians to pass a decree that for the purpose of keeping up their navy, twenty new ships should be built every year. Athens soon after made peace with AEgina, as Xerxes was at Sardis making preparations for invading Greece with all the forces he could muster. At the same time Themistocles was actively engaged in allaying the disputes and hostile feelings which existed among the several states of Greece. He acted, however, with great severity toward those who espoused the cause of the Persians, and a Greek interpreter, who accompanied the envoys of Xerxes that came to Athens to demand earth and water as a sign of submission, was put to death for having made use of the Greek tongue in the service of the common enemy.