by … Robert Abernathy From ancient Martian records came the grim song of a creature whose very existence was long forgotten. James Dalton strode briskly through the main exhibit room of New York’s Martian Museum, hardly glancing to right or left though many displays had been added since his last visit. The rockets were coming home regularly now and their most valuable cargoes—at least from a scientist’s point of view—were the relics of an alien civilization brought to light by the archeologists