▁sh ing le ▁shelter ing ▁salt mar sh ▁and ▁mud ▁fl ats , ▁only ▁ ▁across ▁the ▁water ▁from ▁the ▁Is le ▁of ▁W ight . ▁Tem por ary ▁earth work ▁fort ifications ▁were ▁ere cted ▁on ▁the ▁site ▁and , ▁after ▁the ▁other ▁three ▁cast les ▁had ▁been ▁completed , ▁work ▁then ▁began ▁on ▁Hur st ▁in ▁ 1 5 4 1 ▁under ▁the ▁direction ▁of ▁John ▁M ille , ▁the ▁financial ▁controller , ▁and ▁probably ▁Thomas ▁Bert ie , ▁a ▁master ▁m ason . ▁Bert ie ▁was ▁appointed ▁as ▁the ▁castle ' s ▁captain ▁in ▁ 1 5 4 2 ▁and ▁the ▁work ▁was ▁completed ▁by ▁January ▁ 1 5 4 4 , ▁at ▁a ▁cost ▁of ▁over ▁£ 3 , 2 0 0 . ▁ ▁The ▁result ▁was ▁a ▁stone ▁art illery ▁fort ▁with ▁a ▁central ▁keep ▁and ▁three ▁bast ions , ▁surrounded ▁by ▁a ▁mo at , ▁capable ▁of ▁holding ▁up ▁to ▁ 7 1 ▁guns . ▁In ▁ 1 5 4 7 , ▁however , ▁Hur st ▁was ▁equ ipped ▁with ▁ 2 6 ▁art illery ▁pieces – four ▁made ▁of ▁br ass ▁and ▁the ▁remainder ▁iron – com pr ising ▁a ▁two ▁s akers , ▁a ▁cul ver in , ▁a ▁demi - c annon , ▁a ▁cur t all ▁can non , ▁two ▁demi - cul ver ins , ▁six ▁port pie ces , ▁four ▁sl ings , ▁two ▁quarter - sl ings , ▁and ▁seven ▁bases , ▁three ▁of ▁them ▁in oper able . ▁A