History of the Peloponnesian War

Thucydides

Thucydides, Vol. 1-4. Smith, Charles Foster, translator. London and Cambridge, MA: Heinemann and Harvard University Press, 1919-1923.

And when those in authority at Miletus heard of their coming, they gave orders that one half of the newly arrived ships should guard Cnidos and that the other half should cruise around Triopium and seize the merchantmen that touched there on the way from Egypt. Now this Triopium is a headland projecting from the territory of Cnidos and sacred to Apollo.