"Exactly," he agreed. "Well, young lady, our lives, and far more, depend upon our reaching that exact line in space immediately." "I don't know what you are talking about, but even so, how can we make it? I'm not a rocket." "It's difficult, I admit, but we must. Now hold on tight to my arm, and press your feet firmly against the wall of the ship." She obeyed. "Now when I count three, shove off violently, and pray that we're going straight. Are you game?" She stiffened; then, very slowly, "All right; start counting." "Good girl," Grant said approvingly. "One--two--th-r-ee-ee!" They flexed their legs in perfect unison. And shoved off. * * * * * Out into the blackness of space they shot, lost to all sense of motion: yet the hull of the space-flier, dimly gleaming in the thin light of the far off sun, retreated from them with terrifying swiftness. They were alone in space! It was an uncanny, a horribly helpless sensation. All about them was infinity, a vast void out of which peered at them the cold, unwinking stars. They were like swimmers in mid-ocean, without even the buoyant feel of the salt water to comfort them. Nona's grip on Grant's arm was agonizing in its intensity. "Scared?" Grant queried. "A--a little," she admitted; "but don't bother about me. I'm all right." She could be depended upon to keep up her end, Grant thought admiringly. On and on they floated in the welter of space. And still there was no ray, nothing but unrelieved blackness. Pemberton was somewhat worried. Had the saving ray been quenched at the source? Were they too late? If so, they were doomed to a frightful obliterating fall to the surface of the planet, or worse still, they were destined to swing endlessly in space. Already the liner was far away, out of their grasp, even had they desired to return. His breath was coming in quick gasps now. "Scared?" he once more asked the silent figure beside him. "Frightfully--but carry on. We'll get there, wherever it is." Her gay determination strengthened him wonderfully. On and on they floated. Suddenly the dim, dark bulk of the girl caught the uncanny orange light. The next instant the creatoid fabric of his own suit caught it, too. "Thank God," he cried joyously. "It's still on. Just relax, Nona, the ray will take care of us now." He felt a powerful tug at his body, he was whirled completely around, and then there was a steady pull. He was being catapulted down the ray to the mysterious point of brilliance in the Great Red Spot. The girl was right beside him. The space-liner was passed with a smooth rush, and soon receded to a dwindling speck. * * * * * "Now will you explain?" asked Nona impatiently, after she had caught her breath in sudden relief. Grant stretched luxuriously before he began.