▁until ▁E aster ▁ 1 9 3 5 ▁when ▁another ▁group ▁from ▁the ▁York shire ▁R amb lers ' ▁Club ▁made ▁their ▁way ▁from ▁England . ▁In ▁wet ▁conditions , ▁the ▁ca vers ▁re - enter ed ▁Pool ▁Chamber ▁via ▁the ▁entrance ▁found ▁in ▁ 1 9 0 8 , ▁and ▁after ▁some ▁investigation ▁discovered ▁a ▁high - level ▁craw ling ▁passage ▁exit ing ▁the ▁chamber . ▁The ▁passage ▁ended ▁high ▁in ▁the ▁wall ▁of ▁New ▁Chamber , ▁a ▁ca vern ▁of ▁considerable ▁size , ▁where ▁the ▁up stream ▁continu ation ▁of ▁the ▁river ▁was ▁found . ▁Ex pl oration ▁was ▁halt ed ▁here ▁as ▁the ▁water ▁was ▁too ▁deep ▁to ▁pass . ▁ ▁The ▁club ▁returned ▁to ▁New ▁Chamber ▁in ▁ 1 9 3 6 ▁to ▁explore ▁and ▁survey ▁the ▁on going ▁Sk reen ▁Hill ▁passage , ▁named ▁after ▁the ▁hill ▁on ▁the ▁surface ▁above . ▁After ▁ ▁of ▁walking ▁passage , ▁the ▁ca vers ▁stopped ▁at ▁a ▁deep ▁lake . ▁This ▁section ▁of ▁deep ▁water ▁is ▁where ▁the ▁path ▁of ▁the ▁current ▁show ▁cave ▁ends . ▁When ▁club ▁members ▁returned ▁again ▁in ▁ 1 9 3 8 ▁they ▁brought ▁an ▁infl atable ▁d ing hy , ▁allowing ▁them ▁to ▁progress ▁across ▁the ▁lake , ▁only ▁to ▁discover ▁that ▁the ▁way ▁on ▁was ▁blocked ▁by ▁S ump ▁ 1 , ▁just ▁ ▁from ▁the ▁shore . ▁ ▁During ▁the ▁ 1 9 3 5 ▁expedition ▁another ▁group ▁of ▁ca vers ▁expl ored ▁Lower ▁C rad le ▁H ole ▁C ave . ▁On