Deal Castle continued to be used as a military fortification throughout the 18th century and in 1728 it was equipped with 11 culverin guns.[51] The following year, the captain, naval officer Sir John Norris, redeveloped the castle to improve his personal accommodation.[52] Similar work had been carried out at Walmer in 1708 by the Duke of Dorset, Lionel Sackville and there may have been some competition between the two men.[51] The keep was redesigned with medieval-style battlements and wood-panelled accommodation at the rear overlooking the sea; the porter's lodge was also updated.[53]