The title character in The Clipper in the Clouds (1886) travels above the ground in a flying machine named the "Albatross," and targets hot air balloonists of the Weldon Institute. Like Nemo, he is a mysterious character without a past, and we only learn his identity in a sequel, The Master of the World (1904). Ker Karraje, a Malayan pirate in the novel For the Flag (1896), terrorizes the Pacific Ocean in a submarine. And Captain Nemo's disillusionment with human society is found in the enigmatic Kawdjer of The Survivors of the Jonathan (1909).