Before revision: Other notable early examples include Giacomo Casanova's 1788 Icosaméron, a 5-volume, 1,800-page story of a brother and sister who fall into the Earth and discover the subterranean utopia of the Mégamicres, a race of multicolored, hermaphroditic dwarves; Vril published anonymously in 1819; Symzonia: A Voyage of Discovery by a "Captain Adam Seaborn" (1820) which reflected the ideas of John Cleves Symmes, Jr.; Edgar Allan Poe's 1838 novel The Narrative of Arthur Gordon Pym of Nantucket; Jules Verne's 1864 novel Journey to the Center of the Earth, which showed a subterranean world teeming with prehistoric life; George Sand's 1864 novel Laura, Voyage dans le Cristal where giant crystals could be found in the interior of the Earth ; Etidorhpa, an 1895 science-fiction allegory with major subterranean themes; and The Smoky God, a 1908 novel that included the idea that the North Pole was the entrance to the hollow planet.
After revision: Other notable early examples include Giacomo Casanova's 1788 Icosaméron, a 5-volume, 1,800-page story of a brother and sister who fall into the Earth and discover the subterranean utopia of the Mégamicres, a race of multicolored, hermaphroditic dwarves; ; Sir Edward Bulwer-Lytton's novel Vril: The Power of the Coming Race, published anonymously in 1871 Symzonia: A Voyage of Discovery by a "Captain Adam Seaborn" (1820) which reflected the ideas of John Cleves Symmes, Jr.; Edgar Allan Poe's 1838 novel The Narrative of Arthur Gordon Pym of Nantucket; Jules Verne's 1864 novel Journey to the Center of the Earth, which showed a subterranean world teeming with prehistoric life; George Sand's 1864 novel Laura, Voyage dans le Cristal where giant crystals could be found in the interior of the Earth ; Etidorhpa, an 1895 science-fiction allegory with major subterranean themes; and The Smoky God, a 1908 novel that included the idea that the North Pole was the entrance to the hollow planet.