He did the only thing left for him. He shifted. But in that terrible instant he understood something he had not anticipated. In Helen's eyes there was not only intense shame over shifting into her hypoalter's home; there was not only the disgust with himself for breaking communication codes. He saw that, as a woman of the 20th Century might have felt, Helen hated Clara as a sexual rival. She hated Clara doubly because he had turned not to some other woman, but to the other part of herself whom she could never know. As he shifted, Bill knew that the next light he saw would be on the adamant face of the Medicorps. * * * * * Major Paul Grey, with two other Medicorps officers, entered the Walden apartment about two hours after Bill left it to meet Clara. Major Grey was angry with himself. Important information on a case of communication-breaks and drug-refusal could be learned by letting it run its course under observation. But he had not intended Conrad Manz's life to be endangered, and certainly he would not have taken the slightest chance on what they found in the Walden apartment if he had expected it this early. Major Grey blamed himself for what had happened to Mary Walden. He should have had the machines watching Susan and Mary at the same time that they were relaying all wristband data for Bill and Conrad and for Helen and Clara to his office. He had not done this because it was Susan's shift and he had not expected Mary to break it. Now he knew that Helen and Bill Walden had been quarreling over the fact that Clara was cheating on Helen's shifts, and their conversations had directed the unhappy child's attention to the Manz couple. She had broken shift to meet them ... looking for a loving father, of course. Still--things would not have turned out so badly if Captain Thiel, Mary's school officer, had not attributed Susan Shorrs' disappearance only to poor drug acclimatization. Captain Thiel had naturally known that Major Grey was in town to prosecute Bill Walden, because the major had called on him to discuss the case. Yet it had not occurred to him, until 18 hours after Susan's disappearance, that Mary might have forced the shift for some reason associated with her aberrant father. By the time the captain advised him, Major Grey already knew that Bill had forced the shift on Conrad under desperate circumstances and he had decided to close in. He fully expected to find the father and daughter at the apartment, and now ... it sickened him to see the child's demented condition and realize that Bill had left her there. Major Grey could see at a glance that Mary Walden would not be accessible for days even with the best treatment. He left it to the other two officers to hospitalize the child and set out for the Manz apartment.