Quite naturally she linked arms with Revere as they walked toward the cluster of Earth-dwellings. It was, she thought, a rare event for twins, separated by the gulf between planets, ever to meet after incubation--except of course on such rarified levels as those trod by Rolf Marcein and his brother. She sensed a discomfort, a reserve, behind the routine welcome of Lao Mei-O'Connell, decided swiftly there was some sort of guilt feeling there. As swiftly her twin replied telepathically, _Of course she has feelings of guilt. Thanks to her I was given the coldwrap treatments--even when I was not under Their control. There was no need for them and they made me feel my head would burst. Thank_ farb _you're here!_ _When did you receive these treatments?_ she thought sharply. And the answering thought confirmed her sudden suspicion. Revere had been placed in coldwrap restraint each time a headache had assailed her on Earth. He had been deliberately tortured as part of the campaign to get her to come to Mars and replace him. _That Rolf--that_ marlet! Fury assailed her, fury and frustration. But Revere's grip tightened on her forearm. _I don't mind--now_, he informed her. _We need you here._ It was pathetic but she managed to still the thought aborning. With Revere, as never before in her life, she felt as if she belonged to someone, as if someone belonged to her. But she had not been with him an hour when he said good-bye. He was returning to New Samarkand on the planet-ship for treatment, perhaps ultimately to Earth to replace her. "Don't worry," he told her. "You'll do great, Lynne. Wring their _farbish_ invisible necks." She checked the thrill of panic that caused her, managed _a Look up Ray Cornell when you hit Earth. And ruin Janet just for me._ _Don't be too rough on Rolf_ was his farewell thought. _You'll understand him better--later on._ She watched the takeoff, walked back with Lao Mei-O'Connell in silence. And, twenty minutes later, she stepped off the uplift platform and found herself alone in the patched tower-room of her nightmare. VI Sitting there alone, waiting for something to happen, Lynne for the first time since becoming aware of her telepathic powers began to get a sense of direction along with the thoughts that came to her from outside. Heretofore she had only been conscious of the thoughts themselves, varying in power according to the strength of the thinker. Perhaps because of the altitude of the tower-room, perhaps because her own power was increasing with practise, perhaps because telepathy was easier in the thinner Martian atmosphere than on Earth--perhaps through a combination of all these factors, Lynne was aware of tremendous mental strength.