▁able ▁to ▁bring ▁out ▁only ▁De Mont . ▁Rest all , ▁his ▁son , ▁Gra es er ▁and ▁H ilt z ▁all ▁died . ▁ ▁That ▁year , ▁Robert ▁Dun field ▁le ased ▁port ions ▁of ▁the ▁island . ▁Dun field ▁d ug ▁the ▁pit ▁area ▁to ▁a ▁depth ▁of ▁ ▁and ▁a ▁width ▁of ▁ ▁by ▁using ▁a ▁ 7 0 - ton ▁dig ging ▁c rane ▁with ▁a ▁cl am ▁bucket . ▁Transport ation ▁of ▁the ▁c rane ▁to ▁the ▁island ▁required ▁the ▁construction ▁of ▁a ▁cause way ▁( which ▁still ▁exists ) ▁from ▁the ▁western ▁end ▁of ▁the ▁island ▁to ▁Cr and all ' s ▁Point ▁on ▁the ▁main land , ▁two ▁hundred ▁metres ▁away . ▁Dun field ' s ▁le ase ▁ended ▁in ▁August ▁ 1 9 6 6 . ▁ ▁T rit on ▁Alliance ▁( 1 9 6 7 – 1 9 9 0 s ) ▁In ▁January ▁ 1 9 6 7 , ▁Daniel ▁C . ▁Bl ank ens hip , ▁David ▁Tob ias , ▁Robert ▁Dun field , ▁and ▁Fred ▁N olan ▁formed ▁a ▁synd icate ▁for ▁expl oration ▁on ▁Oak ▁Island . ▁Two ▁years ▁later , ▁Bl ank ens hip ▁and ▁Tob ias ▁formed ▁T rit on ▁Alliance ▁after ▁purch asing ▁most ▁of ▁the ▁island . ▁Several ▁former ▁land own ers , ▁including ▁Mel ▁Ch app ell , ▁became ▁share hold ers ▁in ▁T rit on . ▁T rit on ▁workers ▁exc av ated ▁a ▁ ▁sh aft , ▁known ▁as ▁B ore hole ▁