Cautiously he opened the storeroom door and peered out. Although he was dressed in a perfect replica of guard's uniform, he knew he couldn't pass among men who knew each other so well. He had to stay in hiding. And he had to have air. The corridors were deserted. He passed the guard assembly room and heard faint murmurs of conversation inside. The green light glowed brightly over the door. Barrent walked on, beginning to feel the first signs of dizziness. His gauge showed him that the oxygen content in the corridor was starting to fall. The Group had assumed that the air system would be used throughout the ship. Now Barrent could see that, with only guards and crew aboard, there was no need to supply air for the entire ship. There would be air in the little man-inhabited islands of the guardroom and the crew's section, and nowhere else. Barrent hurried down the dim, silent corridors, gasping for breath. The air was rapidly growing bad. Perhaps it was being used in the assembly room before the ship's main air supply was touched. He passed unlocked doors, but the green bulbs above them were unlighted. He had a pounding headache, and his legs felt as if they were turning to jelly. He tried to figure out a course of action. The crew's section seemed to offer him the best chance. Ship's personnel might not be armed. Even if they were, they would be less ready for trouble than the guards. Perhaps he could hold one of the officers at gunpoint; perhaps he could take over the ship. It was worth trying. It had to be tried. At the end of the corridor he came to a staircase. He climbed past a dozen deserted levels, and came at last to a stenciled sign on one of the walls. It read CONTROL SECTION, and an arrow pointed the way. Barrent took the plastic needlebeam out of his pocket and staggered down the corridor. He was beginning to lose consciousness. Black shadows formed and dissipated on the edges of his vision. He was experiencing vague hallucinations, flashes of horror in which he felt the corridor walls falling in on him. He found that he was on his hands and knees, crawling toward a door marked CONTROL ROOM--_No Admittance except to Ship's Officers._ * * * * * The corridor seemed to be filled with gray fog. It cleared momentarily, and Barrent realized that his eyes were not focusing properly. He pulled himself to his feet and turned the door handle. It began to open. He took a firm grip on the needlebeam and tried to prepare himself for action. But, as the door opened, darkness closed irrevocably around him. He thought he could see startled faces, hear a voice shouting, "Watch out! He's armed!" And then the blackness closed in completely, and he fell endlessly forward. Chapter Twenty-Two