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.

But the Athenians, having had notice of it, and having sailed out from Samos, seized the six ships that were keeping guard at Triopium, though the crews escaped from them. After this they put in at Cnidus, and having assaulted the city, which was unfortifled, were within a little of taking it. The next day they made a second assault on it;

but as they did not now do it so much damage, since the inhabitants had provided better defences during the night, and the crews which had escaped from the ships at Triopium had gone in to join them, they withdrew, and after ravaging the territory of the Cnidians, sailed back to Samos.