History of the Peloponnesian War

When they were come to the ford of the river Anapus, they there found certain of the Syracusians and their confederates embattled against them on the bank; but these they put to flight, and having won the passage marched forward. But the Syracusian horsemen lay still upon them, and their light-armed plied them with their darts in the flank.

This day the Athenians marched forty furlongs, and lodged that night at the foot of a certain hill. The next day, as soon as it was light, they marched forwards about twenty furlongs, and descending into a certain champaign ground, encamped there, with intent both to get victual at the houses (for the place was inhabited) and to carry water with them thence; for before them, in the way they were to pass, for many furlongs together there was but little to be had.

But the Syracusians in the meantime got before them and cut off their passage with a wall. This was at a steep hill, on either side whereof was the channel of a torrent with steep and rocky banks;

and it is called Acraeum Lepas. The next day the Athenians went on; and the horsemen and darters of the Syracusians and their confederates, being a great number of both, pressed them so with their horses and darts that the Athenians after long fight were compelled to retire again into the same camp, but now with less victual than before, because the horsemen would suffer them no more to straggle abroad.