With the thought of treasure, Isle of Wight islander, Derek Williams researched ancient local wreck records. Top of his extensive wreck list was the 40-gun frigate Assurance lost in 1753 while returning from Jamaica with Governor Trelawny on board, whose story possibly inspired Robert Louis Stevenson to write Treasure Island. Derek's first dive at the western point of the Isle of Wight called "The Needles" put him on top of cannons, various wreckage...