Ambitious genius inventor Harry Harding, his boyhood friend Ted, British Fitzherbert and the irascible Silas are on airship adventure to find the fabled Silent City. On their way to the lost civilization seen only in mirages they are beset by natives and outlaws. Surviving by wits and luck the adventurers press forward. Will the inhabitants welcome them or destroy them? Volume includes a new story based on the original, a reprint of the 1909 novel and an informative introduction.