Twenty Thousand Leagues Under the Sea as an inhabitant of British Colonial India, "is an inhabitant of an oppressed country". Verne took the name "Nautilus" from one of the earliest successful submarines, built in 1800 by Robert Fulton, who later invented the first commercially successful steamboat. Fulton's submarine was named after the paper nautilus because it had a sail. Three years before writing his novel, Jules Verne also studied a model of the newly developed French Navy submarine "Plongeur" at the 1867 Exposition Universelle, which inspired him for his definition of the "Nautilus". The breathing apparatus used by "Nautilus" divers is depicted as an untethered version
Captain Nemo the January Uprising; but Verne's editor Pierre-Jules Hetzel feared a book ban in the Russian market and offending a French ally, the Russian Empire, and had Verne obscure Nemo's motivation in the first book. In the second book of "Twenty Thousand Leagues under the Sea", Nemo comes close to revealing his Indian ancestry, though this is not obvious except in retrospect, where he saves a Ceylonese pearl-fisher in the Gulf of Mannar. "Twenty Thousand Leagues Under the Sea" was written between 1869 and 1870 and records the voyages of the "Nautilus" between 1866 and 1868. "The Mysterious Island" was written