Dunster Castle evidence of a fortification at Dunster was an Anglo-Saxon "burgh". This was built on the summit of the hill and was possibly intended to protect the region against sea-borne raiders; by the mid-11th century it was controlled by a local nobleman called Aelfric. In 1066 the Normans invaded south-east England, defeating the English forces at the battle of Hastings: in the aftermath of the victory, William the Conqueror entrusted the conquest of the south-west of England to his half-brother Robert of Mortain. Expecting stiff resistance, Robert marched west into Somerset, supported by forces under Walter of Douai, who entered from
Feudal barony of Dunster War he made Dunster Castle available for use as a convalescent home by the Royal Navy. On the death of his father in 1944 the payment of a large sum in Death Duties left the estate indebted and uneconomic to operate, and Geoffrey, whilst reserving a tenancy for himself at the Castle, sold the estates to a property development company which sold them on to the Commissioners of Crown Lands. He bought back the Castle and grounds in 1954 and opened them to the paying public. He died in 1957 and his widow remained at the Castle until her death