At Rams Hill, on the downs about two miles north of seven barrows, part of the hilltop was at first enclosed by a bank and ditch; but around 1500BC stronger defensive ramparts were put up, with stout palisades on either side of the ditch. Recent excavations suggest that Uffington Castle may have superseded Rams Hill when a much larger and stronger encampment was needed.
Daphne Phillips
Berkshire – A County History