and the carbon-dioxide poisoning were now beginning to tell heavily upon him - and said to McKenzie: "Right, Doc - give me a hand with that space suit."
"I'm ashamed of myself. I'd forgotten all about that."
"And I was worried because some of the other passengers might have remembered. They must all have seen it, when they came in through the air lock. It just goes to prove how you can overlook the obvious."
It took them only five minutes to detach the absorbent canisters and the twenty-four-hour oxygen supply from the suit; the whole breathing circuit had been designed for quick release, in case it was ever needed for artificial respiration. Not for the first time, Pat blessed the skill, ingenuity, and foresight that had been lavished on Selene. There were some things that had been overlooked, or that might have been done a little better - but not many.
Their lungs aching, the only two men still conscious aboard the cruiser stood staring at each other across the gray metal cylinder that held another day of life. Then, simultaneously, each said: "You go first."
They laughed without much humor at the hackneyed situation, then Pat answered, "I won't argue" and placed the mask over his face.
Like a cool sea breeze after a dusty summer day, like a wind from the mountain pine forests stirring the stagnant air in some deep lowlands valley - so the flow of oxygen seemed to Pat. He took four slow, deep breaths, and exhaled to the fullest extent, to sweep the carbon dioxide out of his lungs. Then, like a pipe of peace, he handed the breathing kit over to McKenzie.
Those four breaths had been enough to invigorate him, and to sweep away the cobwebs that had been gathering in his brain. Perhaps it was partly psychological - could a few cubic centimeters of oxygen have had so profound an effect? - but whatever the explanation, he felt like a new man. Now he could face the five-or more - hours of waiting that lay ahead.
Ten minutes later, he felt another surge of confidence. All the passengers seemed to be breathing as normally as could be expected - very slowly, but steadily. He gave each one a few seconds of oxygen, then called Base again.
"Selene here," he said. "Captain Harris reporting. Doctor McKenzie and I both feel quite fit now, and none of the passengers seem distressed. I'll remain listening out, and will call you again on the half-hour."
"Message received. But hold on a minute, several of the news agencies want to speak to you."
"Sony," Pat answered. "I've given all the information there is, and I've twenty unconscious men and women to look after. Selene out."
That was only an excuse, of course, and a feeble one at that; he was not even sure why he had made it. He felt, in a sudden and uncharacteristic burst of rancor: Why, a man can't even die in peace nowadays! Had he known about that waiting camera, only five kilometers away, his reaction might have been even stronger.
"You still haven't answered my question, Captain," said Dr. McKenzie patiently.
"What question? Oh - that. No, it wasn't luck. The Commodore and I both thought you'd be the most useful man to have awake. You're a scientist, you spotted the overheating danger before anyone else did, and you kept quiet about it when we asked you to."
"Well, I'll try to live up to your expectations. I certainly feel more alert than I've done for hours. It must be the oxygen we're sniffing. The big question is: How long will it last?"
"Between the two of us, twelve hours. Plenty of time for the skis to get here. But we may have to give most of it to the others, if they show signs of distress. I'm afraid it's going to be a very close thing."
They were both sitting cross-legged on the floor, just beside the pilot's position, with the oxygen bottle between them. Every few minutes they would take turns with the inhaler-but only two breaths at a time. I never imagined, Pat told himself, that I should ever get involved in the number-one cliche of the TV space operas. But it had occurred in real life too often to be funny any more - especially when it was happening to you.
Both Pat and McKenzie - or almost certainly one of them-could survive if they abandoned the other passengers to their fate. Trying to keep these twenty men and women alive, they might also