, ▁consists ▁in ▁a ▁second ▁bar - like ▁bridge ▁of ▁lim estone ▁somewhat ▁more ▁sl ender ▁than ▁the ▁first , ▁sp anning ▁the ▁secondary ▁r ift ▁in ▁exactly ▁the ▁opposite ▁direction ▁to ▁that ▁assumed ▁by ▁the ▁former , ▁so ▁as ▁to ▁meet ▁the ▁greater ▁bar ▁in ▁the ▁middle ▁of ▁its ▁course ▁and ▁form ▁part ▁of ▁the ▁same ▁tre l lice ▁bridge work . ▁In ▁this ▁manner ▁two ▁cav ities , ▁like ▁those ▁of ▁the ▁or bits ▁in ▁a ▁sk ull ▁are ▁produced ; ▁and ▁the ▁result ▁is ▁wonder fully ▁curious ▁and ▁fine . ▁The ▁first ▁descent ▁was ▁by ▁the ▁York shire ▁R amb lers ' ▁Club ▁in ▁ 1 8 8 9 , ▁when ▁they ▁reached ▁the ▁bottom ▁of ▁the ▁Main ▁Chamber , ▁and ▁noted ▁the ▁stream ▁entering ▁from ▁the ▁east . ▁In ▁ 1 8 9 2 ▁the ▁cave ▁was ▁referred ▁to ▁as ▁" H ell ▁H ole " ▁by ▁the ▁local ▁historian ▁and ▁writer ▁Harry ▁Spe ight , ▁who ▁mistaken ly ▁reported ▁that ▁" the ▁true ▁bottom ▁has ▁never ▁been ▁reached ". ▁The ▁in let ▁passage ▁in ▁Lost ▁Joh ns ' ▁C ave ▁was ▁noted ▁by ▁the ▁York shire ▁R amb lers ▁on ▁their ▁original ▁expl oration ▁in ▁ 1 9 2 8 , ▁but ▁the ▁water ▁was ▁assumed ▁to ▁origin ate ▁from ▁G avel ▁Pot . ▁The ▁connection ▁with ▁Lost ▁Joh ns ' ▁C ave ▁was ▁opened ▁up , ▁by ▁a ▁team ▁from ▁a ▁variety ▁of ▁clubs , ▁in ▁ 2 0 1 1 . ▁ ▁The ▁water fall ▁in