Feudal barony of Dunster Fownes (c. 1722 – 1780), who under his father-in-law's will inherited the Luttrell estates including Dunster Castle, with the proviso that he should adopt the surname and arms of Luttrell. Henry Fownes (c. 1722 – 1780), who married the heiress Margaret Luttrell (1726–1766) and under his father-in-law's will inherited the Luttrell estates including Dunster Castle, with the proviso that he should adopt the surname and arms of Luttrell. He was High Sheriff of Somerset from 1754 to 1755, and a Member of Parliament for Minehead from 1768 to 1774. The couple modernised the Castle, in the Georgian style, which included
Yarn Market, Dunster is in diameter, has a central stone pier which supports a heavy timber framework for the structure. The slate roof has a central wooden lantern topped by a weather vane. The roof is interrupted by a series of dormer windows. Around the periphery is a low wall and vertical timber supports. Some of the sills are stone and others timber. One of the roof beams has a hole in it, a result of cannon fire in the Civil War, when Dunster Castle was a besieged Royalist stronghold for five months under the command of Colonel Wyndham. Following the damage, it