Savagely he plunged his thumb against the lever. The rockets thundered and the ship was arcing up. Another pattern and another. They were plunging upward now under the full thrust of rocket power and still the ruined city was all around them, cragged, broken towers shattered by the blasting of atomic energy.

The soft swirl of light that marked the opening of the time-space tunnel lay between and beyond two blasted towers. Gary fired a short, corrective pattern to line the nose of the ship between the towers and then depressed a stud and fired a blast that drove them straight between the towers, up and over the city, straight for the whirl of light.

The ship arrowed swiftly up. The directional crossbars lined squarely upon the hub of spinning light.

"We're almost there," he said, his breath whistling between his teeth.

"We'll know in just a minute.”

The cold wind out of space was blowing on his face again; the short hairs on his neck were trying to rise into a ruff. The old challenge of the unknown. The old glory of crusading.

He snapped a look at Caroline. She was staring out of the vision plate, staring straight ahead, watching the rim of the wheel spin out until only the blackness of the hub remained.

She turned to him. "Oh, Gary!" she cried, and then the ship plunged into the hub and blackness as thick and heavy and as stifling as the ink of utter space flooded into the ship and seemed to dim the very radium lamps that burned within the room. He heard her voice coming out of the blackness that engulfed them. "Gary, I'm afraid!”

Then the black was gone and the ship rode in space again — in a star-sprinkled space that had, curiously, a warm and friendly look after the blackness of the tunnel.

"There it is!" Caroline cried, and Gary expelled his breath in a sigh of relief.