Dark could feel the strength that went out and raised the polygon, like an invisible extension of himself. Then he felt another force seize the polygon, and it was drawn back firmly and without hesitation to its former place. Dark turned his head back to look into Qril's huge eyes, and at once he was in mental contact with the Martian. Qril was laughing at him. There was no change of expression on Qril's face, but in his mind was the atmosphere of high humor. Qril's thoughts came to him without words, in no language, silently but clearly: _You have not practised your power. Experience will be necessary before you can compete with the simplest effort of one of our race._ Dark turned to Maya. "He's right," said Dark. "I do have extrasensory powers, but they'll need some development." "I know," said Maya. "The telepathic voltage in the atmosphere must be very high right now, because even I sensed your effort in lifting that object, and I understood Qril's communication to you." Maya and Dark took their leave of Qril, and went back into Ultra Vires. As they did so, Qril and the other Martians arose and began to drift away into the desert, as though they had had a mission in staying here, which was now accomplished. "I hope you know something about mechanics," said Maya as they walked down the corridor together. "Because if you don't, it looks like we're stuck here for a while. At least I am, unless you can run one of these groundcars with psychokinetic power." "No, apparently I'm not that good at it yet," said Dark. "Maybe I could teleport in any parts you need. No wait! I just remembered something! Come with me." They turned off into a side corridor, found stairs and climbed to the top floor of the building. There they followed another corridor until Dark stopped and opened a door. It was the door to a small airlock. Dark led Maya through it into a huge room. A helicopter stood in its center. "Goat _did_ leave it here!" exclaimed Dark joyfully. "I'd forgotten that he had this. He must have just packed the most necessary things when he left the place, planning to send trucks and a crew back and clean it out later at his leisure. Now, if this copter's only in good flying shape, we're set." He checked the machine over. Everything was in order. "How do we get it out of here?" asked Maya curiously, looking around the room. "That little airlock's too small for a copter to go through it." "The roof rolls back," said Dark. "Put on your helmet, and I'll show you." Maya donned her marshelmet. Dark went to the wall and pulled a switch. Nothing happened. "I forgot," he said. "The electricity's off. Well, let's try something."