The Histories · 7.144

Another opinion too of Themistocles before this one proved the best at the right moment, when the Athenians, having got large sums of money in the public treasury, which had come in to them from the mines which are at Laureion, were intending to share it among themselves, taking each in turn the sum of ten drachmas. Then Themistocles persuaded the Athenians to give up this plan of division and to make for themselves with this money two hundred ships for the war, meaning by that the war with the Eginetans: for this war having arisen proved in fact the salvation of Hellas at that time, by compelling the Athenians to become a naval power. And the ships, not having been used for the purpose for which they had been made, thus proved of service at need to Hellas. These ships then, I say, the Athenians had already, having built them beforehand, and it was necessary in addition to these to…

Herodotus of Halicarnassus · trans. G. C. Macaulay, 1890
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