History of the Peloponnesian War

Next they began to throw up a mound against the city, hoping that the reduction of it would be very speedily effected with so large an army at work. Cutting down timber therefore from Cithaeron, they built it up on each side, laying it like lattice-work, to serve as walls, that the mound might not spread over a wide space;

and they carried to it brush-wood, and stone, and soil, and whatever else would help to complete it when thrown on. Seventy days and nights continuously they were throwing it up, being divided into relief-parties, so that some should be carrying, while others were taking sleep and refreshment; the Lacedaemonian officers who shared the command over the contingents of each state urging them to the work.

But the Plataeans, seeing the mound rising, put together a wooden wall, and placed it on the wall of their city, where the mound was being made, and built bricks inside it, which they took from the neighbouring houses.