Nautilus (Verne) assembled by Nemo's men on a desert island. "Nautilus" most likely returned to this island and later helped castaways in the novel "The Mysterious Island". After Nemo dies on board, the volcanic island erupts, entombing the Captain and "Nautilus" for eternity. Beside her original appearance in "Twenty Thousand Leagues Under the Sea" and "The Mysterious Island", "Nautilus" and Captain Nemo have appeared in numerous other works. Submarines feature in some other of Verne's works. In the 1896 novel "Facing the Flag", the pirate Ker Karraje uses an unnamed submarine that acts both as a tug to his schooner "Ebba" and
Jules Verne "Voyages extraordinaires" series continued for several years afterwards at the same rate of two volumes a year. It was later discovered that Michel Verne had made extensive changes in these stories, and the original versions were eventually published at the end of the 20th century by the Jules Verne Society (Société Jules Verne). In 1919, Michel Verne published The Barsac Mission (), which original drafts contained references to Esperanto, language about which his father had great interest. In 1989, Verne's great-grandson discovered his ancestor's as yet unpublished novel "Paris in the Twentieth Century" which was subsequently published in 1994. Verne's