 Eighteen of the Storage pits are in what Dymond calls the "keep", one is in the transverse fosse (a fosse is a ditch usually dug for protection), and seventy-four of the pits are outside the "keep" but still enclosed within the exterior walls.The average size of the pits is around long by 2 metres wide and deep.The largest pit is roughly triangular, with sides measuring , , and long.