The archeological excavation demonstrated that there beneath the medieval outer gatehouse and curtain wall was a series of earthworks draw defences dating to the later Bronze Age and the Iron Age (c 900 BC–AD 40), that first tide on Bronze Age fortification broke down a simple bank in the base of the crag, probably with a wooden palisade.
Archaeological excavation demonstrated that beneath the medieval outer gatehouse and curtain wall were a series of earthwork defences dating to the later Bronze Age and the Iron Age (c 900 BC–AD 40). The first later Bronze Age fortification comprised a simple bank at the base of the crag, probably with a wooden palisade.