History of the Peloponnesian War

The same winter, Hippocrates the Lacedaemonian, having sailed from the Peloponnese with ten Thurian ships under the command of Dorieus son of Diagoras, and two colleagues, one Laconian and one Syracusan, sailed into port at Cnidus, which had now revolted at the instigation of Tissaphernes.

When those at Miletus received intelligence of them, they gave orders for half of the vessels to keep guard at Cnidus, and the other half to cruise around Triopium, and seize the merchantmen that were approaching from Egypt. This Triopium is a promontory running out from the Cnidian territory, and is consecrated to Apollo.