His first thoughts concerned some means of spoiling the plans of Selba's band. He guessed, of course, that they were responsible for his present position, and he realized that it was likely that the zero hour of their attack upon the planets was not far off. Could he escape?--a practical impossibility. Nevertheless he looked longingly at the emergency space-boat hugging close to the hull of its mother ship, and fitted so admirably into her streamlining. If he could get to the entrance of that boat--it was in some other room farther toward the bow--he could give his captors a run for their money and perhaps reach Earth. And if he did? Shelby had great confidence in the Atomic Ray. He removed the top from the button where he had secreted the pink crystal. It was still there. But how could he get into the space-boat? Plainly it could not be accomplished now. Perhaps soon--in a few hours maybe, an opportunity would present itself. And there were other things he might do. A moment in the engine room, and he could blow the ship to atoms, and with it, most of the ringleaders of the Selba crowd. Stoically Shelby realized that he too would be destroyed, but if he could serve his world, he would not hesitate to make the move. Bent on getting as well acquainted with his present environment as he could, the Earthman proceeded to examine minutely everything that was within the range of his senses. He tested the strength of his chain, and began to fumble over each link, without having any definite idea of what value the knowledge gleaned from such a procedure would be to him. He had reached about the tenth link when he heard a sound above the purr of rocket motors--voices. There were two of them. One was a man's; the other was soft and feminine. Shelby knew it at once--Janice Darell's! So she too was aboard the space flier! He realized it with a pang of apprehension. In vain the Earthman tried to catch the words they were saying, but beyond detecting the chilly tone in the girl's voice, he could get no idea of what they were talking about. Apparently they were in the room next to his. He heard footsteps in the hall outside, and returned quickly to his bunk. Three people entered the room. The first was the black monster. Shelby gave a gasp when he saw who followed it--Jan. She looked tired and worn but in her face there was no hint of fear. She smiled wanly at Shelby. There was another behind her. It was Hekalu Selba--the man the Earthian thought he had killed! For once Shelby was really dumbfounded. He uttered the Martian's name without thinking. The noble grinned in Satanic amusement. "It is I, none other, my friend," he said. "Aren't you glad to see me? You look as though you were being visited by a ghost."