Wives always try to cure husbands of bad habits, even on lonely asteroids! You must understand that Palmer loved his wife as much as ever, or he would never have thought of his simple little scheme at all. It was entirely for her own good, as he had told himself a dozen times in the past day. And with that he stilled whatever qualms of conscience he might otherwise have had. He didn't think of himself as being something of a murderer. She was sitting at the artificial fireplace, a cheerful relic