He explained rapidly. “Once the Disruptor secret is mine, I can shatter the Empire and dominate the galaxy. But half the galaxy would still hate me as a usurper, an alien. There would be endless revolts and unrest.

“So, once I've got my hand on everything, I'd put forward Zarth Arn, legitimate son of the late Arn Abbas, as new sovereign of the galaxy. I, Shorr Kan, would merely be your trusted advisor. It would be a peaceful federation of the whole galaxy, I'd announce.”

He grinned again. “See how much simpler it would make things for me? A legitimate emperor, no revolts, no unrest. You and Lianna would be the rulers, and enjoy every luxury and respect. I don't care for the pomp and outward show of power, and would be quite content to wield the real power from behind the throne.”

“And if I decided to use my position as nominal ruler to turn the tables on you?” Gordon asked curiously.

Shorr Kan laughed. “You wouldn't, Zarth. The core of the armed forces would be loyal Cloudmen I could trust,” I He stood up. “What do you say? Remember that right now you're a fugitive from the Empire, sought for the murder of your own father. All that can be cleared up, the charge can be disproved, and you can live the greatest sovereign in history. Isn't it intelligent to do so?”

Gordon shrugged. “Your proposal is certainly clever. But I'm afraid you've wasted your time. The stumbling-block is that under no circumstances will you get the Disruptor secret from me.”

He expected a burst of rage from the League ruler. But Shorr Kan merely looked disappointed.

“I was hoping you'd be clearheaded enough to discount all this nonsense about patriotism and loyalties, and use a little sense.”

Lianna flashed, “Of course you cannot understand loyalty and honor, when you have none yourself.”

Shorr Kan looked at her frowningly, though still apparently without anger.

“No, I don't have any,” he agreed. “What, after all, are loyalty, honor, patriotism, all those admirable qualities? Just ideas that people happen to think are praiseworthy, and therefore will die for. I'm a realist. I refuse to injure myself for any mere idea.”

He turned again to Gordon. “Let's not talk any more about it right now. You're tired, your nerves are taut, you're in no shape to make a decision. Get a good night's rest, and think it over tomorrow, and use your brains, not your emotions. You'll surely see that I'm right.”

He added, more slowly, “I could tell you that if you persist in refusing to cooperate, there's a highly unpleasant alternative. But I don't want to threaten you, Zarth. I want you to come in with me, not from any love of me or the League, but simply because you're smart enough to recognize your own interests.”

Gordon for the first time glimpsed the steel within the velvet glove, as he saw the glint in Shorr Kan's black eyes.

The League commander had pressed a signal-button as he spoke. The door opened and Durk Undis entered.

“Give Prince Zarth and his fianc?e the best possible quarters,” Shorr Kan told the younger Cloudman. “They must be strictly guarded, but let the guard be unobtrusive. Any disrespect to them will be severely punished.”

Durk Undis bowed and stood waiting. Gordon took Lianna's arm and silently left the room.

All the way through the corridors and ramps of the gloomy building, Gordon felt that unsettling sense of having met a man who was far stronger than he in shrewdness and cunning, and who might be able to handle him like putty.

This huge citadel of the League of Dark Worlds was a dreary place, by night. The lights that glowed at intervals along its corridors could not dispel the insidious haze that wrapped this world.

The apartment to which they were conducted was far from luxurious. The square, white-walled rooms were strictly utilitarian in design and furniture, with transparent sections of wall looking out over the somber city Thallarna.

Durk Undis bowed stiffly to them. “You will find nutrition-dispensers and all else needful. Let me warn you not to try venturing out of these rooms. Every exit is strictly guarded.”

When the League officer had gone, John Gordon turned and looked at Lianna, who stood by the window.

Something in the brave erectness of her little figure choked him with tenderness. He went to her side.

“Lianna, if I could assure your safety by giving up the secret of the Disruptor, I would,” he said huskily.

She turned quickly, “You must not give it up. Without it, Shorr Kan still hesitates to move. And while he hesitates, there is a chance that Corbulo's treachery may be discovered.”

“There's little chance of our exposing him, I'm afraid,” Gordon said. “There's no possibility of escape from here.”

Lianna's slim shoulders sagged a little. “No, I realize that,” she murmured. “Even if by some miracle we could escape this building and seize a ship, we could never find our way out through the mazes of the Cloud.”

The Cloud. It was the sky here, dark, heavy and menacing, showing no star as it ebon folds enwrapped this grim city.

That dark sky gave Gordon a feeling of claustrophobia, a sense of all the trillions of miles of shadowy gloom that encompassed him and shut him from the star bright spaces of the galaxy outside.

Thallarna was not sleeping. Out there in the severely straight streets streamed many heavy vehicles. Fliers came and went in swarms. Thunderous reverberations droned dimly to them from the distant docks where squadrons of heavy warships were constantly coming and going.

Gordon took the couch in the living-room of their austere apartment, without expectation of being able to sleep. But his tired body relaxed in almost drugged slumber in a short time.

Dawn awoke him-a sickly, shadowy dawn that only slowly revealed the outlines of the room. He found Lianna sitting on the edge of his couch, looking down at him with curious intentness.

She flushed slightly. “I wondered if you were awake. I have our breakfast ready. It is not bad, the nutritional fluid. Though it's likely to become monotonous.”

“I doubt if we will be here long enough to grow tired of it,” Gordon said grimly.

She looked at him. “You think that Shorr Kan will insist on your giving him the Disruptor secret today?”

“I'm afraid so,” he said. “If that secret is all that is holding back his attack, he'll want it as soon as possible.”

Through the hours of the gloomy day, as the red sun swept with somber slowness across the shadowy sky, they expected Shorr Kan's summons.

But it was not until night had returned that Durk Undis and four armed soldiers entered the apartment.

The young fanatic Cloudman again bowed stiffly. “The commander will see you now, Prince Zarth. Alone,” he added quickly, as Lianna stepped forward with Gordon.

Lianna's eyes flashed. “I go where Zarth goes!”

“I regret that I must carry out my orders,” said Durk Undis coldly. “Will you come now, Prince Zarth?”

Lianna apparently realized the hopelessness of further resistance. She stood back.

Gordon hesitated, then let impulse sweep him and strode back to her. He took her face between his hands and kissed her.

“Don't worry, Lianna,” he said, and turned away.

His heart beat painfully as he followed Durk Undis through the corridors. He was certain that he had seen Lianna for the last time.

“Maybe better this way!” he thought. Maybe better to forget her in death than to go back to his own time and be forever haunted by memory of love irrevocably lost.

Gordon's desperate thoughts received a check when he followed his guards into a room. It was not the austere study of the previous day.

This was a laboratory. There was a table, above which hung a massive metal cone connected by cables to a complicated apparatus of banked vacuum tubes and moving tapes. Here were two thin, nervous-looking Cloudmen-and Shorr Kan.