The Mysterious Island Dip". There is also some significance of an adaptation of Captain Nemo and the Mysterious Island in the first arc of the sixth season of Once Upon A Time. Stephen W. White translation (1876) W. H. G.Kingston (Mrs. Agnes Kinloch Kingston) translation (1875) The Mysterious Island The Mysterious Island () is a novel by Jules Verne, published in 1874. The original edition, published by Hetzel, contains a number of illustrations by Jules Férat. The novel is a crossover sequel to Verne's famous "Twenty Thousand Leagues Under the Sea" and "In Search of the Castaways", though its themes are vastly different
Twenty Thousand Leagues Under the Sea of underwater breathing apparatus designed by Benoit Rouquayrol and Auguste Denayrouze in 1865. They designed a diving set with a backpack spherical air tank that supplied air through the first known demand regulator. The diver still walked on the seabed and did not swim. This set was called an "aérophore" (Greek for "air-carrier"). Air pressure tanks made with the technology of the time could only hold 30 atmospheres, and the diver had to be surface supplied; the tank was for bailout. The durations of 6 to 8 hours on a tankful without external supply recorded for the Rouquayrol set in