Nordenfeld asked carefully conversational-sounding questions. Kathy Brand, now aged ten, had been taken by her father to live in a big room without any windows. It hadn't any doors, either. There were plants in it, and there were bluish lights to shine on the plants, and there was a place in one corner where there was water. When her father came in to talk to her, he came up out of the water wearing the funny suit with glass over his face. He went out the same way. There was a place in the wall where she could look out into another room, and at first her mother used to come and smile at her through the glass, and she talked into something she held in her hand, and her voice came inside. But later she stopped coming. * * * * * There was only one possible kind of place which would answer Kathy's description. When she was six years old she had been put into some university's aseptic-environment room. And she had stayed there. Such rooms were designed for biological research. They were built and then made sterile of all bacterial life and afterward entered through a tank of antiseptic. Anyone who entered wore a suit which was made germ-free by its passage through the antiseptic, and he did not breathe the air of the aseptic room, but air which was supplied him through a hose, the exhaled-air hose also passing under the antiseptic outside. No germ or microbe or virus could possibly get into such a room without being bathed in corrosive fluid which would kill it. So long as there was someone alive outside to take care of her, a little girl could live there and defy even chlorophage. And Kathy Brand had done it. But, on the other hand, Kamerun was the only planet where it would be necessary, and it was the only world from which a father would land his small daughter on another planet's spaceport. There was no doubt. Nordenfeld grimly imagined someone--he would have had to be a microbiologist even to attempt it--fighting to survive and defeat the chlorophage while he kept his little girl in an aseptic-environment room. She explained quite pleasantly as Nordenfeld asked more questions. There had been other people besides her father, but for a long time there had been only him. And Nordenfeld computed that somehow she'd been kept alive on the dead planet Kamerun for four long years. Recently, though--very recently--her father told her that they were leaving. Wearing his funny, antiseptic-wetted suit, he'd enclosed her in a plastic bag with a tank attached to it. Air flowed from the tank into the bag and out through a hose that was all wetted inside. She breathed quite comfortably. It made sense. An air tank could be heated and its contents sterilized to supply germ-free--or virus-free--air. And Kathy's father took an axe and chopped away a wall of the room. He picked her up, still inside the plastic bag, and carried her out. There was nobody about. There was no grass. There were no trees. Nothing moved.