away, growing small and distant. "Give me a read on dial 67!" "Four." "Make it six! And set your automatic pilot to 61 and 14 and 35. Now—everything's okay. Keep your chronometer reading this way—seven, nine, twelve. There'll be a few tight scrapes, but you'll hit Jupiter square on in 24 hours, if you jump your speed to 700,000 six hours from now and hold it that way." "Square on it is, Mr. Nibley." Nibley just lay there a moment. His voice was easy and not so high and shrill any more. "And on the way back to Mars, later, don't try to find me. I'm going out in the dark on this metal rock. Nothing but dark for me. Back to perihelion and sun for you. Know—know where I'm going?" "Where?" "Centaurus!" Nibley laughed. "So help me God I am. No lie!" He watched the ship going out, then, and he felt the compact, collected trajectories of all the men in it. It was a good feeling to know that he was the guiding theme. Like in the old days.... Douglas' voice broke in again. "Hey, Pop. Pop, you still there?" A little silence. Nibley felt blood pulsing down inside his suit. "Yep," he said. "We just gave Bruno your little note to read. Whatever it was, when he finished reading it, he went insane." Nibley said, quiet-like. "Burn that there paper. Don't let anybody else read it." A pause. "It's burnt. What was it?" "Don't be inquisitive," snapped the old man. "Maybe I proved to Bruno that he didn't really exist. To hell with it!" The rocket reached its constant speed. Douglas radioed back: "All's well. Sweet calculating, Pop. I'll tell the Rocket Officials back at Marsport. They'll be glad to know about you. Sweet, sweet calculating. Thanks. How goes it? I said—how goes it? Hey, Pop! Pop?" Nibley raised a trembling hand and waved it at nothing. The ship was gone. He couldn't even see the jet-wash now, he could only feel that