The unreal silence of outer space closed in about The Traveler . In front of the huge atom-powered space rocket hung the sun's dazzling disc and behind the pale, silver face of the earth echoed the light. Captain Vic Arlen was a god in the heavens; Dave McFerson, the engineer, was a demi-god. And what was Harry Renzu? It was hard to call a great scientist a devil. There was Gheal—neither god nor devil, only a poor, hideous, half-human slave that had been brought with Renzu to the earth from a pr