Captain Nemo and the Underwater City offers Fraser a position at Templemer. This alienates Joab, who helps Fraser and the Baths steal Nautilus II, on condition they leave without bloodshed, and allow the crew to return with the submarine intact. They manage to take the submarine and are followed by Nemo in his submarine. Nemo explains there is fault with the Nautilus II's engines that means the sub could explode. The chase is brief. Unable to match the speed of the escaping submarine, Nemo has Nautilus I sheer away, to try 'going under the reef.' Confused by their pursuers apparently giving up, Fraser asks the Nautilus
Captain Nemo in 1874 but is set immediately after the American Civil War, from 1861 to 1865. This would mean that Captain Nemo who appeared in "The Mysterious Island" dies "before" Captain Nemo who appeared in "Twenty Thousand Leagues Under the Sea" sets out on the undersea travels. Also, when Captain Nemo is finally seen in "The Mysterious Island", he mentions having met Aronnax 16 years previously. Many errors in the original French first printing (the 'grand in-8' published by Pierre-Jules Hetzel) are likely the fault of the editors who, at that time, were unlikely to consult the authors of the books