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.
Here Kathy's account was vague, but Nordenfeld could guess at the strangeness of a dead planet, to the child who barely remembered anything but the walls of an aseptic-environment room.
Her father carried her to a little ship, said Kathy, and they talked a lot after the ship took off. He told her that he was taking her to a place where she could run about outdoors and play, but he had to go somewhere else. He did mysterious things which to Nordenfeld meant a most scrupulous decontamination of a small spaceship's interior and its airlock. Its outer surface would reach a temperature at which no organic material could remain uncooked.
And finally, said Kathy, her father had opened a door and told her to step out and good-by, and she did, and the ship went away—her father still wearing his funny suit—and people came and asked her questions she did not understand.
Kathy's narrative fitted perfectly into the rumor Jensen said circulated among usually well-informed people on Altaira. They believed, said Jensen, that a small spaceship had appeared in the sky above Altaira's spaceport. It ignored all calls, landed swiftly, opened an airlock and let someone out, and plunged for the sky again. And the story said that radar telescopes immediately searched for and found the ship in space. They trailed it, calling vainly for it to identify itself, while it drove at top speed for Altaira's sun.
It reached the sun and dived in.
Nordenfeld reached the skipper on intercom vision-phone. Jensen had been called there to repeat his tale to the skipper.
"I've talked to the child," said Nordenfeld grimly, "and I'm putting her into isolation quarters in the hospital compartment. She's from Kamerun. She was kept in an aseptic-environment room at some university or other. She says her father looked after her. I get an impression of a last-ditch fight by microbiologists against the chlorophage. They lost it. Apparently her father landed her on Altaira and dived into the sun. From her story, he took every possible precaution to keep her from contagion or carrying contagion with her to Altaira. Maybe he succeeded. There's no way to tell—yet."
The skipper listened in silence.
Jensen said thinly, "Then the story about the landing was true."
"Yes. The authorities isolated her, and then shipped her off on the Star Queen. Your well-informed friends, Jensen, didn't know what their government was going to do!" Nordenfeld paused, and said more coldly still, "They didn't handle it right. They should have killed her, painlessly but at once. Her body should have been immersed, with everything that had touched it, in full-strength nitric acid. The same acid should have saturated the place where the ship landed and every place she walked. Every room she entered, and every hall she passed through, should have been doused with nitric and then burned. It would still not have been all one could wish. The air she breathed couldn't be recaptured and heated white-hot. But the chances for Altaira's population to go on living would be improved. Instead, they isolated her and they shipped her off with us—and thought they were accomplishing something by destroying the lift-ship that had her in an airtight compartment until she walked into the Star Queen's lock!"
The skipper said heavily, "Do you think she's brought chlorophage on board?"
"I've no idea," said Nordenfeld. "If she did, it's too late to do anything but drive the Star Queen into the nearest sun.... No. Before that, one should give warning that she was aground on Altaira. No ship should land there. No ship should take off. Altaira should be blocked off from the rest of the galaxy like Kamerun was. And to the same end result."
Jensen said unsteadily; "There'll be trouble if this is known on the ship. There'll be some unwilling to sacrifice themselves."
"Sacrifice?" said Nordenfeld. "They're dead! But before they lie down, they can keep everybody they care about from dying too! Would you want to land and have your wife and family die of it?"
The skipper said in the same heavy voice, "What are the probabilities? You say there was an effort to keep her from contagion. What are the odds?"
"Bad," said Nordenfeld. "The man tried, for the child's sake. But I doubt he managed to make a completely aseptic transfer from the room she lived in to the spaceport on Altaira. The authorities on Altaira should have known it. They should have killed her and destroyed everything she'd touched. And still the odds would have been bad!"
Jensen said, "But you can't do that, Nordenfeld! Not now!"
"I shall take every measure that seems likely to be useful." Then Nordenfeld snapped, "Damnation, man! Do you realize that this chlorophage can wipe out the human race if it really gets loose? Do you think I'll let sentiment keep me from doing what has to be done?"
He flicked off the vision-phone.
The Star Queen came out of overdrive. Her skipper arranged it to be done at the time when the largest possible number of her passengers and crew would be asleep. Those who were awake, of course, felt the peculiar inaudible sensation which one subjectively translated into sound. They felt the momentary giddiness which—having no natural parallel—feels like the sensation of treading on a stair-step that isn't there, combined with a twisting sensation so it is like a spiral fall. The passengers who were awake were mostly in the bars, and the bartenders explained that the ship had shifted overdrive generators and there was nothing to it.