UNDERSEA KINGDOM (1937) is the story of Ray “Crash” Corrigan, Athlete and Navy Lieutenant, who joins Professor Norton and Reporter Diana Compton in a Rocket Submarine to inspect an earthquake location beneath the Atlantic Ocean. Finding the lost kingdom they become embroiled in an Atlantean civil war between Sharad (with his White Robes) and the usurper Unga Khan (with his Black Robes) who wishes to conquer Atlantis and then destroy the upper world with earthquakes generated by his Disintegrator.