History of the Peloponnesian War

Having come up by the hill of Euryelus (where the former army had ascended at first), unobserved by the enemy's guards, they went up to the fort which the Syracusans had there, and took it, and put to the sword part of the garrison.

The greater number, however, escaped at once and gave the alarm to the camps, of which there were three upon Epipolae, defended by outworks, one of the Syracusans, one of the other Siceliots, and one of the allies; and also to the six hundred Syracusans forming the original garrison for this part of Epipolae.

These at once advanced against the assailants, and falling in with Demosthenes and the Athenians, were routed by them after a sharp resistance, the victors immediately pushing on, eager to achieve the objects of the attack without giving time for their ardor to cool; meanwhile others from the very beginning were taking the counter wall of the Syracusans, which was abandoned by its garrison, and pulling down the battlements.

The Syracusans and the allies, and Gylippus with the troops under his command, advanced to the rescue from the outworks, but engaged in some consternation (a night attack being a piece of audacity which they had never expected), and were at first compelled to retreat.