"Have to open it still wider soon. Here are your pills, Duke-a double dose of Seconal and a Miltown."

"Thanks." Duke swallowed them, chased them with whisky. "I'm going to sleep on the floor, too. Coolest place in the house."

"Smart of you. All right, let's settle down. Give the pills a chance."

Hugh sat with Karen after she bedded down, then gently extracted his hand from hers and returned to the tank room. The temperature was up two degrees. He opened the valve on the working tank still wider, listened to it sigh to emptiness, shook his head, got a wrench and shifted the gauge to a full tank. Before he opened it, he attached a hose, led it out into the main room. Then he went back to pretending to play solitaire.

A few minutes later Barbara appeared in the doorway. "I'm not sleepy," she said. "Could you use some company?"

"You've been crying."

"Does it show? I'm sorry."

"Come sit down. Want to play cards?"

"If you want to. All I want is company."

"We'll talk. Would you like another drink?"

"Oh, would I! Can you spare it?"

"I stocked plenty. Barbara, can you think of a better night to have a drink? But both of us will have to see to it that the other one doesn't go to sleep."

"All right. I'll keep you awake."

They shared a cup, Scotch with water from the tank. It poured out as sweat faster than they drank it. Hugh increased the gas flow again and found that the ceiling was unpleasantly hot. "Barbara, the house must have burned over us. There is thirty inches of concrete above us and then two feet of dirt."

"How hot do you suppose it is outside?"

"Couldn't guess. We must have been close to the fireball." He felt the ceiling again. "I beefed this thing up-roof, walls, and floor are all one steel-reinforced box. It was none too much. We may have trouble getting the doors open. All this heat- And probably warped by concussion."

She said quietly, "Are we trapped?"

"No, no. Under these bottles is a hatch to a tunnel. Thirty inch culvert pipe with concrete around it. Leads to the gully back of the garden. We can break out-crowbars and a hydraulic jack-even if the end is crushed in and covered with crater glass. I'm not worried about that; I'm worried about how long we can stay inside... and whether it will be safe when we leave."

"How bad is the radioactivity?"

He hesitated. "Barbara, would it mean anything to you? Know anything about radiation?"

"Enough. I'm majoring-I was majoring-in botany; I've used isotopes in genetics experiments. I can stand bad news, Hugh, but not knowing-well, that's why I was crying."

"Mmm- The situation is worse than I told Duke." He jerked his thumb over his shoulder. "Integrating counter back of the bottles. Go look."

She went to it, stayed several minutes. When she came back, she sat down without speaking. "Well?" he asked.

"Could I have another drink?"

"Certainly." He mixed it.

She sipped it, then said quietly, "If the slope doesn't change, we'll hit the red line by morning." She frowned. "But that marks a conservative limit. III remember the figures, we probably won't start vomiting for at least another day."

"Yes. And the curve should level off soon. That's why heat worries me more than radiation." He looked at the thermometer, cracked the valve still wider. "I've been running the water-vapor getter on battery; I don't think we should crank the blower in this heat. I'm not going to worry about Cee-Oh-Two until we start to pant."

"Seems reasonable."

"Let's forget the hazards. Anything you'd like to talk about? Yourself?"

"Little to tell, Hugh. Female, white, twenty-five years old. Back in school, or was, after a bad marriage. A brother in the Air Force-so possibly he's all right. My parents were in Acapulco, so perhaps they are, too. No pets, thank God-and I was so pleased that Joe saved his cat. No regrets, Hugh, and not afraid... not really. Just... sad." She sniffed. "It was a pretty nice world, even if I did crumb up my marriage."

"Don't cry."

"I'm not crying! Those drops are sweat."

"Yes. Surely."

"They are. It's terribly hot." Suddenly she reached both hands behind her ribs. "Do you mind? If I take this off? Like Karen? It's smothering me."

"Go ahead. Child, if you can get comfortable-or less uncomfortable-do so. I've seen Karen all her life, Grace even longer. Skin doesn't shock me." He stood up, went behind the oxygen bottles, and looked at the record of radiation. Having done so, he checked the thermometer and increased the flow of oxygen.

As he sat down he remarked, "I might as well have stored air instead of oxygen, then we could smoke. But I did not expect to use it for cooling." He ignored the fact that she had accepted his invitation to be comfortable. He added, "I was worried about heating the place. I tried to design a stove to use contaminated air safely. Possible. But difficult."

"I think you did amazingly well. This is the only shelter I've ever heard of with stored air. You're a scientist. Aren't you?"

"Me? Heavens, no. High school only. What little I know I picked up here and there. Some in the Navy, metal work and correspondence courses. Then I worked for a public futility and learned something about construction and pipelines. Then I became a contractor." He smiled. "No, Barbara, I'm a 'general specialist.' 'The Elephant Child's 'satiable curiosity.' Like Dr. -Livingston-I-Presume.

"How did a cat get a name like that?"

"Karen. Because he's a great explorer. That cat can get into anything. Do you like cats?"

"I don't know much about them. But Dr. Livingstone is a beauty."

"So he is but I like all cats. You don't own a cat, he is a free citizen. Take dogs; dogs are friendly and fun and loyal. But slaves. Not their fault, they've been bred for it. But slavery makes me queasy, even in animals."

He frowned. "Barbara, I'm not as sad over what has happened as you are. It might be good for us. I don't mean us six; I mean our country."

She looked startled. "How?"

"Well- It's hard to take the long view when you are crouching in a shelter and wondering how long you can hold out. But- Barbara, I've worried for years about our country. It seems to me that we have been breeding slaves-and I believe in freedom. This war may have turned the tide. This may be the first war in history which kills the stupid rather than the bright and able-where it makes any distinction."

"How do you figure that, Hugh?"

"Well, wars have always been hardest on the best young men. This time the boys in service are as safe or safer than civilians. And of civilians those who used their heads and made preparations stand a far better chance. Not every case, but on the average, and that will improve the breed. When it's over, things will be tough, and that will improve the breed still more. For years the surest way of surviving has been to be utterly worthless and breed a lot of worthless kids. All that will change."

She nodded thoughtfully. "That's standard genetics. But it seems cruel."

"It is cruel. But no government yet has been able to repeal natural laws, though they keep trying."

She shivered in spite of the heat. "I suppose you're right. No, I know you're right. But I could face it more cheerfully if I thought there was going to be any country left. Killing the poorest third is good genetics... but there is nothing good about killing them all."

"Mmm, yes. I hate to think about it. But I did think about it. Barbara, I didn't stockpile oxygen just against radiation and fire storm. I had in mind worse things."

"Worse? How?"

"All the taik about the horrors of World War Three has been about atomic weapons-fallout, hundred-megaton bombs, neutron bombs. The disarmament talks and the pacifist parades have all been about the Bomb, the Bomb, the Bomb-as if A-weapons were the only thing that could kill. This may not be just an A-weapons war; more likely it is an ABC war-atomic, biological, and chemical." He hooked a thumb at the tanks. "That's why I stocked that bottled breathing. Against nerve gas. Aerosols. Viruses. God knows what. The communists won't smash this country if they can kill us without destroying our wealth. I wouldn't be surprised to learn that bombs had been used only on military targets like the antimissile base here, but that New York and Detroit and such received nerve gas. Or a twenty-four plague with eighty percent mortality. The horrid possibilities are endless. The air outside could be loaded with death that a counter won't detect and a filter can't stop." He smiled grimly. "Sorry. You had better go back to bed."