The results of five seasons of excavation (1971–5) are summarized. A continuous strip 30–40 m. wide extending across the centre of the fort from one side to the other was completely excavated revealing pits, gullies, circular stake-built houses, rectangular buildings, and 2-, 4-, and 6-post structures, belonging to the period from the sixth to the end of the second century B.C. The types of structures are discussed. A sequence of development, based largely upon the stratification preserved behind the ramparts, is presented: in the sixth–fifth century the hill was occupied by small four-post ‘granaries’ possibly enclosed by a palisade. The first hill-fort rampart was built in the fifth century protecting houses, an area of storage pits, and a zone of 4-and 6-post buildings laid out in rows along streets. The rampart was heightened in the third century, after which pits continued to be dug and rows of circular houses were built. About 100 B.C. rectangular buildings, possibly of a religious nature, were erected, after which the site was virtually abandoned. Social and economic matters are considered. The excavation will continue.