"Right now," Eylan said.

Barrent received a general briefing on the physical make-up of Earth, its climate and major population centers. Then he was sent to Colonel Bray, formerly of the Earth Deep s.p.a.ce Establishment. Bray talked to him about the probable military strength of Earth as represented by the number of guardships around Omega and their apparent level of scientific development. He gave estimates of the size of the Earth forces, their probable divisions into land, sea, and s.p.a.ce groups, their a.s.sumed level of efficiency. An aide, Captain Carell, lectured on special weapons, their probable types and ranges, their availability to the general Earth population. Another aide, Lieutenant Daoud, talked about detection devices, their probable locations, and how to avoid them.

Then Barrent was turned back to Eylan for political indoctrination. From him, Barrent learned that Earth was believed to be a dictatorship. He learned the methods of a dictatorship, its peculiar strengths and weaknesses, the role of the secret police, the use of terror, the problem of informers.

When Eylan was finished with him, Barrent went to a small, beady-eyed man who lectured on Earth's memory-destroying system. Using the premise that memory-destruction was regularly employed to render opposition ineffective, the man went on to construct the probable nature of an underground movement on Earth given those circ.u.mstances, and how Barrent might contact them, and what the underground's capabilities might be.

Finally he was given the full details of Group Two's plan for getting him on board the ship.

When Landing Day came, Barrent felt a definite sense of relief. He was heartily sick of day and night cramming. Any sort of action would seem an improvement.

Chapter Twenty-One

Barrent watched the huge prison ship maneuver into position and sink noiselessly to the ground. It gleamed dully in the afternoon sun, tangible proof of Earth's long reach and powerful grasp. A hatch opened, and a landing stage was let down. The prisoners, flanked by guards, marched down and a.s.sembled in the square.

As usual, most of the population of Tetrahyde had gathered to watch and cheer the disembarkation ceremony. Barrent moved through the crowd and stationed himself behind the ranks of prisoners and guards. He touched his pocket to make sure the needlebeam was still there. It had been made for him by Group Two fabricators, completely of plastic to escape any metals detector. The rest of his pockets were stuffed with equipment. He hoped he wouldn't have to use any of it.

The loudspeaker voice began to read off the prisoners' numbers, as it had when Barrent had disembarked. He listened, knees slightly bent, waiting for the beginning of the diversion.

The loudspeaker voice was coming to the end of the prisoner list. There were only ten left. Barrent edged forward. The voice droned on. Four prisoners left, three....

As the number of the last prisoner was announced, the diversion began. A black cloud of smoke darkened the pale sky, and Barrent knew that the Group had set fire to the empty barracks in Square A-2. He waited.

Then it came. There was a stupendous explosion, blasting through two rows of empty buildings. The shock wave was staggering. Even before debris began to fall, Barrent was running toward the ship.

The second and third explosions went off as he came into the ship's shadow. Quickly he stripped off his Omegan outer garments. Under them, he wore a facsimile of guard's uniform. Now he ran toward the landing stage.

The loudspeaker voice was calling loudly for order. The guards were still bewildered.

The fourth explosion threw Barrent to the ground. He got to his feet instantly and sprinted up the landing stage. He was inside the ship.

Outside, he could hear the guard captain shouting orders. The guards were beginning to form into ranks, their weapons ready to use against the restive crowd. They were retreating to the ship in good order.

Barrent had no more time to listen. He was standing in a long, narrow corridor. He turned to the right and raced toward the bow of the ship.

Far behind him, he could hear the heavy marching tread of the guards.

Now, he thought, the information he had been given about the ship had better be right, or the expedition was finished before it began.

He sprinted past rows of empty cells, and came to a door marked GUARD a.s.sEMBLY ROOM. A lighted green bulb above the door showed that the air system was on. He went by it, and came to another door. Barrent tried it now, and found it unlocked. Within was a room stacked high with spare engine parts. He entered and closed the door.

The guards marched down the corridor. Barrent could hear them talking as they entered the a.s.sembly room.

"What do you think started those explosions?"

"Who knows? Those prisoners are crazy, anyhow."

"They'd blow up the whole planet, if they could."

"Good riddance."

"Well, it didn't cause any damage. There was an explosion like that about fifteen years ago. Remember?"

"I wasn't here then."

"Well, it was worse than this. Two guards were killed, and maybe a hundred prisoners."

"What started it?"

"Don't know. These Omegans just enjoy blowing things up."

"Next thing you know, they'll be trying to blow _us_ up."

"Not a chance. Not with the guardships up there."

"You think so? Well, I'll be glad to get back to the checkpoint."

"You said it. Be good to get off this ship and live a little."

"It isn't a bad life at the checkpoint, but I'd rather go back to Earth."

"Well, you can't have everything."

The last of the guards entered the a.s.sembly room and dogged the door shut. Barrent waited. After a while, he felt the ship vibrate. It was beginning its departure.

He had learned some valuable information. Apparently all or most of the guards got off at the checkpoint. Did that mean that another detachment of guards got on? Probably. And a checkpoint implied that the ship was searched for escaped prisoners. It was probably only a perfunctory search, since no prisoner had escaped in the history of Omega. Still, he would have to figure out a way of avoiding it.

But he would face that when the time came. Now he felt the vibration cease, and he knew that the ship had left the surface of Omega. He was aboard, un.o.bserved, and the ship was on its way to Earth. So far, everything had gone according to plan.

For the next few hours, Barrent stayed in the storage room. He was feeling very tired, and his joints had begun to ache. The air in the small room had a sour, exhausted smell. Forcing himself to his feet, Barrent walked to the air vent and put his hand over it. No air was coming through. He took a small gauge out of his pocket. The oxygen content of the room was falling rapidly.

Cautiously he opened the storeroom door and peered out. Although he was dressed in a perfect replica of guard's uniform, he knew he couldn't pa.s.s among men who knew each other so well. He had to stay in hiding.

And he had to have air.

The corridors were deserted. He pa.s.sed the guard a.s.sembly room and heard faint murmurs of conversation inside. The green light glowed brightly over the door. Barrent walked on, beginning to feel the first signs of dizziness. His gauge showed him that the oxygen content in the corridor was starting to fall.

The Group had a.s.sumed that the air system would be used throughout the ship. Now Barrent could see that, with only guards and crew aboard, there was no need to supply air for the entire ship. There would be air in the little man-inhabited islands of the guardroom and the crew's section, and nowhere else.

Barrent hurried down the dim, silent corridors, gasping for breath. The air was rapidly growing bad. Perhaps it was being used in the a.s.sembly room before the ship's main air supply was touched.

He pa.s.sed unlocked doors, but the green bulbs above them were unlighted.

He had a pounding headache, and his legs felt as if they were turning to jelly. He tried to figure out a course of action.