▁event ▁of ▁their ▁victory . ▁In ▁ 1 2 1 6 ▁he ▁arrived ▁in ▁England ▁and ▁captured ▁Ro chester ▁Castle ; ▁it ▁is ▁not ▁known ▁how , ▁as ▁no ▁document ary ▁evidence ▁recording ▁the ▁event ▁surv ives . ▁ ▁Henry ▁III ▁ ▁John ▁died ▁in ▁ 1 2 1 6 ▁and ▁was ▁succeeded ▁by ▁his ▁nine - year - old ▁son , ▁Henry , ▁with ▁the ▁support ▁of ▁the ▁bar ons . ▁With ▁no ▁prospect ▁of ▁becoming ▁King ▁of ▁England , ▁Louis ▁returned ▁to ▁France . ▁Ro chester ▁Castle ▁was ▁returned ▁to ▁royal ▁control ▁in ▁ 1 2 1 7 . ▁Given ▁the ▁damage ▁in cur red ▁during ▁John ' s ▁sie ge , ▁the ▁castle ▁was ▁in ▁dire ▁need ▁of ▁rep airs . ▁Between ▁ 1 2 1 7 ▁and ▁ 1 2 3 7 ▁around ▁£ 6 8 0 ▁were ▁spent ▁on ▁rep airs , ▁of ▁which ▁£ 5 3 0 ▁were ▁taken ▁up ▁by ▁work ▁on ▁the ▁keep . ▁In ▁ 1 2 2 5 ▁and ▁ 1 2 2 6 ▁the ▁town ▁walls ▁were ▁en hanced ▁by ▁the ▁addition ▁of ▁a ▁d itch ▁at ▁the ▁cost ▁of ▁£ 3 0 0 . ▁The ▁new ▁d itch ▁en closed ▁B ole y ▁Hill , ▁possibly ▁to ▁den y ▁the ▁position ▁to ▁future ▁ag gress ors ▁who ▁might ▁attack ▁the ▁castle . ▁Rep airs ▁began ▁with ▁the ▁castle ' s ▁outer ▁cur tain ▁wall . ▁At ▁the ▁same ▁time ▁a ▁chap el ▁was ▁built ▁within ▁the ▁castle . ▁In ▁ 1