Dunster Castle the north; a third force, under the command of William de Mohun, landed by sea along the Somerset coast. William had been granted 68 manors in the region and by 1086 had established a castle at Dunster; this would form both the "caput", or principal castle, for his new lands, and help guard the coast against the threat of any fresh sea-borne attack, as well as controlling the coastal road running from Somerset to Gloucestershire. This first castle was a motte and bailey design, built upon the former Anglo-Saxon "burgh"; the top of the Tor was scarped to form the
Gallox Bridge, Dunster gallows. The narrow bridge is approach via a raised causeway for pedestrians, while wheeled traffic uses the adjacent ford. The bridge crosses the River Avill which rises on the eastern slopes of Dunkery Beacon and flows north through Timberscombe and Dunster flowing into the Bristol Channel at Dunster Beach. It is likely that there was a previous bridge on the same site as in the 14th century it was known as Doddebrigge. The bridge may have been at the limit of the tidal mouth of the river during the medieval period. Dunster Beach, which includes the mouth of the River