Foreword Naturally, my imagination has been constantly intrigued by speculation as to the fate of Tangor, since his unseen, perhaps ghostly, fingers typed the story of his advent upon Poloda, that mysterious planet some 450,000 light years from Earth; typed them upon my own machine one midnight while I sat amazed, incredulous, and fascinated, with my hands folded in my lap. His story told of his death behind the German lines in September, 1959, when he was shot down in a battle with three Messerschmitts, and of how he had found himself, alive, uninjured, and as naked as the day he was born, in another world. I hung upon every line that he wrote; his description of the underground city of Orvis with its great buildings that were lowered deep beneath the surface of the ground when the Kap