History of the Peloponnesian War

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

When their arrival was known at Miletus, orders came to them to leave half their squadron to guard Cnidus, and with the rest to cruise round Triopium and seize all the merchantmen arriving from Egypt. Triopium is a promontory of Cnidus and sacred to Apollo.