History of the Peloponnesian War
Thucydides
Thucydides. The history of the Peloponnesian War, Volume 1-2. Dale, Henry, translator. London: Heinemann and Henry G. Bohn, 1851-1852.
For they built it of no great strength just there, expecting never to be beaten at sea themselves; and also thinking that if the enemy once forced a landing, the place then became easy to take.
At this point then he went down to the very sea, and posted his heavy-armed, to prevent a landing, if possible; while he encouraged them with these words: