▁and ▁much ▁heav ier ▁guns . ▁ ▁Im prov ements ▁were ▁carried ▁out ▁between ▁ 1 8 5 2 ▁and ▁ 1 8 5 6 ▁at ▁a ▁cost ▁of ▁over ▁£ 6 , 7 2 5 . ▁The ▁keep ▁was ▁adapted ▁to ▁support ▁ 3 2 - p ound er ▁( 1 4 . 5   kg ) ▁guns , ▁the ▁sea ward - f acing ▁bast ions ▁and ▁cur tain ▁walls ▁were ▁rein for ced ▁with ▁brick ▁cas em ates ▁and ▁new ▁gun ▁positions , ▁and ▁the ▁mo at ▁was ▁deep ened ▁to ▁protect ▁against ▁any ▁surprise ▁attack . ▁Two ▁batter ies ▁were ▁built ▁to ▁the ▁west ▁and ▁east ▁of ▁the ▁castle , ▁protected ▁by ▁sh ing le ▁and ▁earth ▁and ▁linked ▁to ▁the ▁old ▁castle ▁by ▁covered ▁passage ways ▁called ▁cap on iers ; ▁a ▁def ens ible ▁bar rack ▁block ▁was ▁built ▁beside ▁the ▁western ▁battery , ▁to ▁provide ▁further ▁protection ▁against ▁any ▁attack ▁from ▁the ▁land . ▁The ▁result ▁was ▁that ▁Hur st ▁was ▁re - est ab lished ▁as ▁a ▁powerful ▁fort ification , ▁equ ipped ▁with ▁four teen ▁ 3 2 - p ound er ▁guns , ▁fifteen ▁ 8 - inch ▁( 2 0 3   mm ) ▁shell ▁guns ▁and ▁two ▁ 3 2 - p ound er ▁car ron ades ; ▁in ▁w art ime , ▁these ▁required ▁a ▁team ▁of ▁ 4 4 0 ▁men , ▁with ▁a ▁pe ac etime ▁g arrison ▁of ▁ 1 0 5 ▁soldiers . ▁Fort ▁Albert ▁was