The Iliad 7.427–441

And in like manner over against them the well-greaved Achaeans heaped the corpses upon the pyre, their hearts sore stricken, and when they had burned them with fire they went their way to the hollow ships. Now when dawn was not yet, but night was still 'twixt light and dark, then was there gathered about the pyre the chosen host of the Achaeans, and they made about it a single barrow, rearing it from the plain for all alike; and thereby they built a wall and a lofty rampart, a defence for their ships and for themselves. And therein they made gates, close-fastening, that through them might be a way for the driving of chariots. And without they dug a deep ditch hard by, wide and great, and therein they planted stakes.