Histories
Herodotus
Herodotus. Godley, Alfred Denis, translator. Cambridge, MA; London: Harvard University Press; William Heinemann, Ltd., 1920-1925 (printing).
Thus spoke Themistocles with intent to deceive, and the Athenians obeyed him; since he had always been esteemed wise and now had shown himself to be both wise and prudent, they were ready to obey whatever he said.
Having won them over, Themistocles straightway sent men in a boat whom he could trust not to reveal under any question the message which he charged them to deliver to the king; one of these was his servant Sicinnus. When these men came to Attica [23.5,38.83] (department), Central Greece and Euboea, Greece, Europe Attica, the rest remained with the boat, and Sicinnus went up to Xerxes;