Twenty Thousand Leagues Under the Sea of the premiere adventure novels and one of Verne's greatest works, along with "Around the World in Eighty Days" and "Journey to the Center of the Earth". The description of Nemo's ship, the "Nautilus", was considered ahead of its time, as it accurately describes features on submarines, which at the time were very primitive vessels. A model of the French submarine "Plongeur" (launched in 1863) was displayed at the 1867 Exposition Universelle, where it was studied by Jules Verne, who used it as an inspiration for the novel. The title refers to the "distance traveled" while under the sea and
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