Russ watched the meter. The speed was little more than ten miles a second now and dropping rapidly. He sat motionless, hunched, sucking at his dead pipe, listening to the thrumming of the generators. * * * * * "If we only had a margin," he groaned. "If we just had a few more horsepower. Just a few. But we're wide open. Every engine is developing everything it can!" Greg tapped him on the shoulder, gently. Russ turned his head and looked into the face of his friend, a face as bleak as ever, but with a hint of smile in the corners of the eyes. "Why not let Jupiter help us?" he asked. "He could be a lot of help." Russ stared for a moment, uncomprehending. Then with a sob of gladness he reached out a hand, shoved over a lever. Mirrors of anti-entropy shifted, assumed different angles, and the _Invincible_ sheered off. They were no longer retreating directly from the Sun, but at an angle quartering off across the Solar System. Greg grinned. "We're falling behind Jupiter now. Letting Jupiter run away from us as he circles his orbit, following the Sun. Adds miles per second to our velocity of retreat, even if it doesn't show on the dial." The cosmic tug of war went on, grimly--two ships straining, fighting each other, one seeking to escape, the other straining to snake the second ship into the maw of open, hostile space. The speed was down to five miles a second, then a fraction lower. The needle was flickering now, impossible to decide whether it was dropping or not. And in the engine rooms, ten great generators howled in their attempt to make that needle move up the dial again. Russ lit his pipe, his eyes not leaving the dial. The needle was creeping lower again. Down to three miles a second now. He puffed clouds of smoke and considered. Saturn fortunately was ninety degrees around in his orbit. On the present course, only Neptune remained between them and free space. Pluto was far away, but even if it had been, it really wouldn't count, for it was small and had little attraction. In a short while Ganymede and Callisto would be moving around on the far side of Jupiter and that might help. Everything counted so much now. The dial was down to two miles a second and there it hung. Hung and stayed. Russ watched it with narrowed eyes. By this time Craven certainly would have given up much hope of help from Jupiter. If the big planet couldn't have helped him before, it certainly couldn't now. In another hour or two Earth would transit the Sun and that would cut down the radiant energy to some degree. But in the meantime Craven was loading his photo-cells and accumulators, was laying up a power reserve. As a last desperate resort he would use that power, in a final attempt to break away from the _Invincible_.