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
Twenty Thousand Leagues Under the Sea errors, sometimes dramatically changing the meaning of Verne's original intent (including uniformly mistranslating French "scaphandre" — properly "diving apparatus" — as "cork-jacket", following a long-obsolete meaning as "a type of lifejacket"). Some of these mistranslations have been done for political reasons, such as Nemo's identity and the nationality of the two warships he sinks, or the portraits of freedom fighters on the wall of his cabin which originally included Daniel O'Connell. Nonetheless, it became the standard English translation for more than a hundred years, while other translations continued to draw from it and its mistakes (especially the mistranslation of the