History of the Peloponnesian War

Demosthenes and the Acarnanians had now intelligence that the Ambraciotes from the city of Ambracia, according to the message sent to them before from Olpae [which was that they should bring their whole power through Amphilochia to their aid], were already on their march (ignorant of what had passed here) to join with those at Olpae.

And hereupon he sent a part of his army presently forth to beset the ways with ambushment and to pre-occupy all places of strength, and prepared withal to encounter with the rest of his army.

In the meantime, the Mantineans and such as had part in the truce, going out on pretence to gather potherbs and firewood, stole away by small numbers, and as they went, did indeed gather such things as they pretended to go forth for;