▁keep . ▁As ▁in ▁ 1 2 1 5 ▁the ▁keep ▁proved ▁resist ant ▁to ▁miss iles , ▁and ▁after ▁a ▁week ▁had ▁not ▁succ um bed . ▁According ▁to ▁one ▁contemporary ▁source , ▁the ▁bes ie gers ▁were ▁about ▁to ▁dig ▁a ▁mine ▁beneath ▁the ▁tower , ▁but ▁the ▁sie ge ▁was ▁abandoned ▁on ▁ 2 6 ▁April ▁when ▁the ▁ear ls ▁received ▁news ▁of ▁a ▁relief ▁force ▁led ▁by ▁Henry   III ▁and ▁his ▁son , ▁Prince ▁Edward . ▁ ▁Later ▁history ▁Though ▁the ▁g arrison ▁had ▁held ▁out ▁within ▁the ▁keep , ▁the ▁rest ▁of ▁the ▁castle ▁had ▁in cur red ▁severe ▁damage , ▁but ▁no ▁attempt ▁was ▁made ▁to ▁carry ▁out ▁rep airs ▁until ▁the ▁reign ▁of ▁Edward   III ▁( 1 3 2 7 – 1 3 7 7 ). ▁It ▁was ▁noted ▁in ▁ 1 2 7 5 ▁that ▁the ▁castle ' s ▁const ables ▁had ▁not ▁only ▁failed ▁to ▁make ▁any ▁effort ▁to ▁repair ▁the ▁structure ▁but ▁had ▁caused ▁further ▁damage : ▁they ▁st ole ▁stone ▁from ▁the ▁castle ▁for ▁reuse ▁elsewhere . ▁In ▁ 1 2 8 1 ▁John ▁of ▁Cob ham , ▁the ▁const able , ▁was ▁granted ▁permission ▁to ▁pull ▁down ▁the ▁castle ' s ▁hall ▁and ▁ch amb ers ▁which ▁had ▁been ▁left ▁as ▁bur nt - out ▁ru ins ▁after ▁the ▁ 1 2 6 4 ▁sie ge . ▁N umer ous ▁surve ys ▁in ▁the ▁following ▁century ▁bear ▁test ament ▁to ▁the ▁castle ' s ▁sorry ▁state ▁and ▁follow ▁its