The History of Bricks: Mesopotamia - JANE STREET CLAYWORKS
And now I must describe how the soil dug out to make the moat was used, and the method of building the wall. While the digging was going on, the earth that was shoveled out was formed into bricks, which were baked in kilns as soon as sufficient number were made; then using hot bitumen for mortar, the workmen began at revetting the brick each side of the moat, and then went on to erect …