The Queen of the Silver Stars stepped to the opening in the chamber and glanced down. "It's too late to go that way. We'll have to use the old air tunnel." She came back into the room and approached an opening on the other side so small that the two men had not noticed it. "I can squeeze through. If you can follow me we can get out through here." Roal considered the width of his shoulders dubiously. "We can try." He assisted Alayna into the narrow opening after she again discarded the cape which hampered her movement. Shorty followed. He was of small build, not very much larger than Alayna. Finally Roal wormed his own way into it, thankful he was not bothered by claustrophobia. He lay on his side with one arm extended forward, the other down towards the mouth of the tube. This made it possible to guard the entrance with the flame lance. It was stifling hot in the tube, and dust rose to choke them as the result of their struggles. Roal assumed Alayna was making good progress. And Shorty seemed to be having no trouble but he was creeping forward by painful inches. The opening was visible as a dim spot of light beyond his feet, but suddenly that spot of light wavered and darkened. Someone had passed before it. Roal stopped moving and stared down. It wasn't merely someone standing before the opening. A Martian was bending forward, looking into it. And Roal caught the glimmer of light on a gun as it was aimed down the tube towards him. Quickly, he squeezed the trigger of his own lance at full power. A dozen bursts of flame plunged down the length of the air tube. The first one toppled the Martian in the mouth of the tube. Successive shots bit into the roof and walls near the mouth. A hiss of melting sand turned into a roar as the tube collapsed behind them. Waves of choking dust smothered them and threw them into coughing spasms. Alayna gave a frantic cry of alarm and Shorty tried to squirm about to see what had happened. Roal explained to them. "And it means there's only one way to go, now--forward. Is there any chance of them cutting us off, Alayna?" "Plenty. It all depends on how many controls the Thousand Minds may have near the other end. Fortunately, the main controls were there in the lab with my father and you killed many of them. But we'll soon be through. I'll try to go faster." Roal could have said that she needn't hurry on his account. Already Shorty was a considerable distance ahead of him, and Alayna was probably much farther by the sound of her voice. They were silent then until Alayna called that she had finally dropped into a chamber opening from the tube. Roal increased his struggles, but Shorty was out long before he was. When he emerged, a gasp of recognition came to his lips. It was one of the dream rooms of Starhouse. Alayna nodded as she saw Roal's eyes widen. "This is Starhouse," she said. "Follow me as if you were merely spacemen visiting here for dreams."