The Truro Company was formed in 1849 by investors who re-excavated the shaft back down to the 86 - foot ( 26 m ) level ; the pit flooded again .
Truro Company was decided to drill into the ground beneath the bottom of the shaft .
The Truro Company was formed in 1849 by investors who re-excavated the shaft back down to the 86 - foot ( 26 m ) level ; the pit flooded again , and it was decided to drill into the ground beneath the bottom of the shaft .