Frane Lewis enjoyed another sadistic shiver as he moved up the narrow passageway to the captain's control room. To his flared nostrils the warm, moist air of the small space-freighter was still heavy with the smell of death. A psychiatrist could have told him that this was a neural confusion of olfactory sensation with the perverted emotional excitement of murder. But no physicians ever attended Frane's murders, except at inquests. Three crewmen, still warm, lay at their posts with bloody splotc