4 9 ▁by ▁invest ors . ▁The ▁pit ▁was ▁re - ex c av ated ▁back ▁down ▁to ▁the ▁ ▁level , ▁but ▁ended ▁up ▁flo oding ▁again . ▁It ▁was ▁then ▁decided ▁to ▁dr ill ▁five ▁bore ▁holes ▁using ▁a ▁pod - au ger ▁into ▁the ▁original ▁sh aft . ▁The ▁aug er ▁passed ▁through ▁a ▁spr uce ▁platform ▁at ▁, ▁then ▁hit ▁layers ▁of ▁o ak , ▁something ▁described ▁as ▁" met al ▁in ▁pieces ", ▁another ▁spr uce ▁layer , ▁and ▁cl ay ▁for ▁. ▁This ▁platform ▁was ▁hit ▁twice ▁each ▁time ▁metal ▁was ▁brought ▁to ▁the ▁surface ▁along ▁with ▁various ▁other ▁items ▁such ▁as ▁wood ▁and ▁co con ut ▁fib re . ▁ ▁Another ▁sh aft ▁was ▁then ▁d ug ▁ 1 0 9 ▁feet ▁( 3 3   m ) ▁deep ▁north west ▁of ▁the ▁original ▁sh aft , ▁and ▁a ▁tunnel ▁was ▁again ▁branch ed ▁off ▁in ▁an ▁attempt ▁to ▁intersect ▁the ▁tre asure . ▁Once ▁again ▁though , ▁se aw ater ▁flo oded ▁this ▁new ▁sh aft ; ▁workers ▁then ▁assumed ▁that ▁the ▁water ▁was ▁connected ▁to ▁the ▁sea ▁as ▁the ▁now ▁flo oded ▁new ▁pit ▁rose ▁and ▁fell ▁with ▁each ▁t ide ▁cycle . ▁The ▁Tru ro ▁Company ▁shift ed ▁its ▁resources ▁to ▁exc av ating ▁a ▁nearby ▁c ove ▁known ▁as ▁" Smith ' s ▁C ove " ▁where ▁they ▁found ▁a ▁flo od ▁tunnel ▁system . ▁When ▁efforts ▁failed ▁to ▁shut ▁off ▁the ▁flo od ▁system , ▁one ▁final ▁sh aft ▁was ▁d