Mysterious Island (1961 film) buried, but the rest escape and begin the journey home, vowing to continue Nemo's dream of achieving lasting peace throughout the world. The novel on which the film is based is a sequel to two other novels by Jules Verne, "In Search of the Castaways" (1867) and "Twenty Thousand Leagues Under the Sea" (1870). The first book featured the island, the pirates and a character Tom Ayrton who was marooned on a nearby island. The second book featured Captain Nemo and the "Nautilus" presumed lost in the maelstrom at the end of that novel. In "The Mysterious Island" (1874) after
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