Limited excavation at the south-west angle of this small and now L-shaped earthwork showed the defences to consist of abutting rubble banks revetted front and rear with massive drystone walling, with a ditch to the west. Radio-carbon determinations indicate that the defences were constructed in the latter part of the Iron Age and provide dates for the coarse pottery of Iron Age ‘A’ type in use on the site prior to the construction of the banks and while ditch silting was taking place. The site continued to be frequented in the Roman period.