The Histories · 6.48

After this Dareios began to make trial of the Hellenes, what they meant to do, whether to make war with him or to deliver themselves up. He sent abroad heralds therefore, and appointed them to go some to one place and others to another throughout Hellas, bidding them demand earth and water for the king. These, I say, he sent to Hellas; and meanwhile he was sending abroad other heralds to his own tributary cities which lay upon the sea-coast, and he bade them have ships of war built and also vessels to carry horses..

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