'Take good care of that ship,' Tommy told Gary. Gary slapped him on the arm.
'I'll bring it back to you,' he said.
'Well be waiting for you,' Kingsley rumbled.
'Hell,' moaned Herb, 'I never get to have any fun. Here you and Caroline are going out there to the Earth and I got to stay behind.”
'Listen,' said Gary savagely, 'there's no use in risking all our lives.
Caroline's going because she may be the only one who could understand what the old Earth people can tell us, and I'm going because I play a better hand of poker. I beat you all, fair and square.”
'I was a sucker,' mourned Herb. 'I should have known you'd have an ace in the hole. You always got an ace in the hole.”
Tommy grinned.
'I got a lousy band,' he said. 'We should have played more than just one band.”
'It was one way of deciding it,' said Gary. 'We all wanted to go, so we played one hand of poker. We couldn't waste time for more. I won. What more do you want?”
'You always win,' Herb complained.
'Just how much chance have you got?' Tommy asked Caroline.
She shrugged.
'It works out on paper,' she declared. 'When we came here the Engineers had to distort time and space to get us here, but they distorted the two equally. Same amount of distortion for each. But here you have to distort time a whole lot more. Your factors are different. But we have a good chance of getting where we're going?’
'If it's there when you get there…' Herb began, but Kingsley growled at him and he stopped.
Caroline was talking swiftly to Kingsley.
'The Engineer understands the equation for the hyperspheres,' she was saying. 'Work with him. Try to set up several of them in our own space and see if it isn't possible to set up at least one outside the universe. Pinch it off the time-space warp and shove it out into the inter-space. We may be able to use it later on.”
A blast of sound smote them and the solid masonry beneath their feet shivered to the impact of a bomb. For a single second the flashing blaze of atomic fury made the brilliant sunlight seem pale and dim.
'That one was close,' said Tommy.
They were used to bombs now.
Gary craned his neck upward and saw the silvery flash of ships far overhead.
'The Engineers can't hold out much longer,' Kingsley rumbled. 'If we are going to do anything we have to do it pretty soon.”
'There is the old space warp again,' said Herb. He pointed upward and the others sighted out into space beyond his pointing finger.
There it was… the steady wheel of light, the faint spin of space in motion… they had seen back on Pluto.
The doorway to another world.
'I guess,' said Caroline, 'that means we have to go.' Her voice caught on something that sounded like a sob.
She turned to Kingsley. 'If we don't come back,' she said, 'try the hyperspheres anyhow. Try to absorb the energy in them. You won't have to control it long. Just long enough so the other universe explodes. Then we'll be safe.”
She stepped through the air lock and Gary followed her. He turned back and looked at the three of them… great, rumbling Kingsley with his huge head thrust forward, staring through his helmet, with his metal-shod fists opening and closing; dapper, debonair Tommy Evans, the boy who had dreamed of flying to Alpha Centauri and had come to the edge of the universe instead; Herb, the dumpy little photographer who was eating out his heart because he couldn't go. Through eyes suddenly bleared with emotion, Gary waved at them and they waved back. And then he hurried into the ship, slammed down the lever that swung tight the air-lock valves.
In the control room he took off his helmet and dropped into the pilot's seat. He looked at Caroline. 'Good to get the helmet off,' he said.
She nodded, lifting her own off her head.
His fingers tapped out a firing pattern. He hesitated for a moment, his thumb poised over the firing lever.
'Listen, Caroline,' be asked, 'how much chance have we got?”
'We'll get there,' she said.
'No,' he snapped, 'don't tell me that. Tell me the truth. Have we any chance at all?”
Her eyes met his and her mouth sobered into a thin, straight line.
'Yes, some,' she said. 'Not quite fifty-fifty. There are so many factors of error, so many factors of accident. Mathematics can't foresee them, can't take care of them, and mathematics are the only signposts that we have.”
He laughed harshly.
'We're shooting at a target, don't you see?' she said. 'A target millions of light-years away, and millions of years away as well, and you have to have a different set of co-ordinates for both the time and distance. The same set won't do for both. It's difficult.”
He looked at her soberly. She said it was difficult. He could only faintly imagine how difficult it might be. Only someone who was a master at the mathematics of both time and space could even faintly understand — someone, say, who had thought for forty lifetimes.
'And even if we do hit the place,' he said, 'it may not be there.”
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.
Below them swam a planet, a planet such as they had seen in the spinning bowl back in the city of the Engineers. A planet that was spotted with mighty mountains weathered down to meek and somber hills, a planet with shallow seas and a thinning atmosphere.
'The Earth,' said Gary, looking at it.
Yes, the Earth. The birthplace of the human race, now an old and senile planet tottering to its doom, a planet that had outlived its usefulness. A planet that had mothered a great race of people — a race that always strove to reach what was just beyond, always reaching out to the not-as-yet, that met each challenge with a battle cry. A crusading people.
'It's really there,' said Caroline. 'It's real.”
Gary glanced swiftly at the instruments. They were only a matter of five hundred miles above the surface and as yet there was no indication of atmosphere. Slowly the ship was dropping toward the planet, but still there was
