History of the Peloponnesian War

The Boeotians immediately sent for dartmen and slingers from the Malian gulf, and having been reinforced since the battle by two thousand Corinthian heavy-armed, and the Peloponnesian garrison which had evacuated Nisaea, and some Megareans with them, they marched against Delium and assaulted the fortress, both attempting it in other ways, and bringing against it an engine of the following description, which was the means of taking it.