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.

This coming to the knowledge of the Athenians, they sailed from Samos and captured the six ships on the watch at Triopium, the crews escaping out of them. After this the Athenians sailed into Cnidus and made an assault upon the town, which was unfortified, and all but took it;

and the next day assaulted it again, but with less effect, as the inhabitants had improved their defences during the night, and had been reinforced by the crews escaped from the ships at Triopium. The Athenians now withdrew, and after plundering the Cnidian territory sailed back to Samos.