"Now I'll wish you good-night, Dani and Captain Aron. It's time and past for supper and a nightcap for old Vezzarn, who talks a deal more than he should, I think."

"Didn't know the Worm stuff had been around here," Goth remarked thoughtfully as they turned away from the groundcab that had brought them back up to their house.

"You already knew about that, eh?" The captain nodded. "I had the impression you did. Got something to tell you, but we'd better wait till we're private."

"Uh-huh!"

She went up the winding stairway to the living room while the captain took the groceries they'd picked up in the port shopping area to the kitchen. When he followed her upstairs he saw an opaque cloudy shimmering just beyond the living room door, showing she'd switched on their spy-proofing gadget. The captain stepped into the shimmering and it cleared away before him. The watch-shaped device lay on the table in the center of the room, and Goth was warming her hands at the fireplace. She looked around.

"Well," he said, "now we can talk. Did Vezzarn have his story straight?"

Goth nodded. "Pretty straight. That Worm World isn't really a world at all, though."

"No? What is it?"

"Ship," Goth told him. "Sort of a spaceship. Big one! Big as Uldune or Karres...Better tell me first what you were going to."

"Well -- " The captain hesitated. "It's that description Vezzarn gave of the Nuris..." He reported his dream, the feelings it had aroused in him, and what had been going on when he woke up. "Apparently there really was Worm Weather over Zergandol that night," he concluded.

"Uh-huh!" Goth's teeth briefly indented her lower lip. Her eyes remained reflectively on his face.

"But I don't have any explanation for the dream," the captain said. "Unless it was the kind of thing Vezzarn was talking about."

"Wasn't exactly a dream, Captain. Nuris have a sort of klatha. You were seeing them that way. Likely, they knew it."

"What makes you think that?" he asked, startled.

"Nuris hunt witches," Goth explained.

"Hunt them? Why?"

She shrugged. "They've figured out too much about the Manaret business on Karres...Other reasons, too!"

Now he became alarmed. "But then you're in danger while we're on Uldune!"

"I'm not," Goth said. "You were in danger. You'd be again if we got Worm Weather anywhere near Zergandol."

"But..."

"You got klatha. Nuris would figure you for a witch. We'll fix that now!"

She moved out before him, facing him, lifted a finger, held it up in front of his eyes, a few feet away. Her face grew dead serious, intent. "Watch the way it moves!"

He followed the fingertip as it drew a fleeting, wavy line through the air.

Goth's hand stopped, closed quickly to a fist as if cutting off the line behind it.

"You do it now," she said. "In your head."

"Draw the same kind of line, you mean?"

"Uh-huh."

She waited while the captain went through some difficult mental maneuverings.

"Got it!" he announced at last, with satisfaction.

Goth's finger came up again. "Now this one..."

Three further linear patterns were traced in the air for him, each quite different from the others. Practicing them mentally, the captain felt himself grow warm, perspiry, vaguely wondered why. When he was able to say he'd mastered the fourth one, Goth nodded.

"Now you do them together, Captain...one after the other, the way I showed you, as quick as you can!"

"Together, eh?" He loosened his collar. He wasn't just perspiring now; he was dripping wet. A distinct feeling of internal heat building up...some witch trick she was showing him. He might have felt more skeptical about it if it weren't for the heat. "This helps against Nuris?"

"Uh-huh. A lock." Goth didn't smile; she was disregarding his appearance, and her small brown face was still very intent. "Hurry up! You mustn't forget any of it."

He grunted, closed his eyes, concentrated.

Pattern One-easy! Pattern Two...Pattern Three...

His mind wavered an instant, groping. Internal heat suddenly surged up.

Startled, he remembered: Four!

A blurred pinwheel of blue brilliance appeared, spun momentarily inside his skull, collapsed to a diamond-bright point, was gone. As it went, there was a snapping sensation, also inside his skull-an almost audible snap. Then everything was relaxing, went quiet. The heat magically ebbed away while he drew a breath.

He opened his eyes, somewhat shaken.

Goth was grinning. "Knew you could do it, Captain!"

"What did I do?" he asked.

"Built a good lock! You'll have to practice a little still. That'll be easy. The Nuris come around then, you switch the lock on. They won't know you're there!"

"Well, that's fine!" said the captain weakly. He looked about for a cloth, mopped at his face. He'd have to change his clothes, he decided. "Where'd that heat come from?"

"Klatha heat. It's a hot pattern, all right, that's why it's so good...Don't show those moves to somebody who can't do them right. Not unless you don't mind about them."

"Oh? Why not?"

"Because they'll burn right up, flames and smoke, if they try to do them and don't stop fast enough," Goth said. "Never seen someone do it, but it's happened."

She might have thought he was nervous if he hadn't repeated the experiment right away to get in the practice she felt he needed. So he did. It was surprisingly easy then. On the first run through, the line patterns seemed to flicker into existence almost as his thoughts turned to one after another of them.

On the second, he could barely keep up with the overall pattern as it took shape and was blanked out again by the spinning blue blur. On the third, there was only an instant flash of brilliance and that odd semi-audible snap near the top of his skull. At that point he realized there had been no recurrence of the uncomfortable heat sensations.

"You got it now!" his mentor decided when he reported. "Won't matter if you're asleep either. The locks know their business."

"Incidentally, how did you know I could do it?" the captain inquired.

"You picked up the Nuris," Goth said. "That's good, so early..." Over dinner she filled out his picture of the Worm World and its unpleasant inhabitants.

Manaret and the witches had been at odds for a considerable time, around a hundred and fifty years, Karres time, Goth said; though she wasn't sure of the exact period. The baleful effect of the Worm World on human civilizations was more widespread and more subtle than anyone like Vezzarn could guess, and not limited to the Nuri raids. There were powerful and malignant minds there which could act across vast reaches of space and created much mischief in human affairs.

Telepathic adepts among the people of Karres set out to trace these troubles to their source and presently discovered facts about Manaret no one had suspected. It was not a world at all, they found, but a ship of unheard-of size that had come out of an alien universe which had no normal connections to the universe known to humanity. Several centuries ago, some vast cataclysm had temporarily disabled the titanic ship and hurled it and its crew into this galaxy; and the disaster was followed by a mutiny led by Moander, the entity who "spoke in a thousand voices." Moander, the witches learned, was a monstrous robot- brain which had taken almost complete control of the great ship, forcing the race which had built Manaret and been its masters to retreat to a heavily defended interior section where Moander's adherents could not reach them.

Karres telepaths contacted these people who called themselves the Lyrd- Hyrier, gaining information from them but no promise of help against Moander.

Moander was holding the ship in this universe with the apparent purpose of gaining control of human civilizations here and establishing itself as ultimate ruler. The Nuris, whose disagreeable physical appearance gained Manaret the name of Worm World, were a servant race which in the mutiny had switched allegiance from the Lyrd-Hyrier to Moander.

"So-then," Goth said, "Moander found out Karres was spying on him.

That's when the Nuris started hunting witches..."

The discovery also slowed down Moander's plans of conquest. Karres, the megalomaniac monster evidently decided, must be found and destroyed before it could act freely. The witches at that time had no real defense against the Nuris'

methods of attack and, some eighty years ago, had been obliged to shift their world beyond the western side of the Empire to avoid them. The Nuris were not only a mental menace. They had physical weapons of alien type at their disposal which could annihilate the life of a planet in very short order. There had been a great deal to learn and work out before the witches could consider confronting them openly.

"They've been coming along with that pretty well, I think," Goth said. "But it's about time, too. Manaret's been making a lot of trouble and it's getting worse."

"In what way?" The captain found himself much intrigued by all this.

The Worm World more recently had developed the tactics of turning selected individual human beings into its brain-washed tools. It was suspected the current Emperor and other persons high in his council were under the immediate influence of Moander's telepathic minions. "One of the reasons we don't get along very well with the Imperials," Goth explained, "is the Emperor's got orders out to find a way to knock out Karres for good. They haven't found one yet, though."

The captain reflected. "Think the reason your people moved Karres had to do with Manaret again?" he asked.

Goth shrugged. "Wouldn't have to," she said. "The Empire's politics go every which way, I guess. We help the Empress Hailie, she's the best of the lot.

Maybe somebody got mad about that. I don't know. Anyway, they won't catch Karres that easy..."

He reflected again. "Have they found out where the Worm World is?

Vezzarn thought..."

"That's strategy, Captain," Goth said, rather coldly.

"Eh?"

"If anyone on Karres knows where it is, they won't say so to anyone else who doesn't have to know they know. Supposing you and I got picked up by the Nuris tonight..."

"Hm!" he said. "I get it."

It sounded like the witches were involved in interesting maneuvers on a variety of levels. But he and Goth were out of all that. Privately, the captain regretted it a little.

Their own affairs on Uldune, however, continued to progress satisfactorily.

Public notice had been posted that on completion of her outfitting by the firm of Sunnat, Bazim & Filish, the modernized trader Evening Bird, skippered by Captain Aron of Mulm, would embark on a direct run through the Chaladoor to the independent world of Emris. Expected duration of the voyage: sixteen days.

Reservation for cargo and a limited number of passengers could be made immediately, at standard risk run rates payable with the reservations and not refundable. A listing of the Evening Bird's drive speeds, engine reserves, types of detection equipment, and defensive and offensive armament was added.

All things considered, the response had been surprising. Apparently competition in the risk run business was not heavy at present. True, only three passengers had signed up so far, while the Venture's former crew quarters had been remodeled into six comfortable staterooms and a combined dining room and lounge. But within a week the captain had been obliged to put a halt to the cargo reservations. He'd have to see how much space was left over after they'd stowed away the stuff he'd already committed himself to carry.

They were in business. And the outrageous risk run rates made it rather definitely big business.

Of the three passengers, one was a beautiful darkeyed damsel, calling herself Hulik do Eldel, who wanted to get to Emris as soon as she possibly could, for unspecified personal reasons, and who had, she said, complete confidence that Captain Aron and his niece would see her there safely. The second was a plump, fidgety financier named Kambine, who perspired profusely at any mention of the Chaladoor but grew hot-eyed and eager when he spoke of an illegal fortune he stood to make if he could get to a certain address on Emris within the next eight weeks. The captain liked that part not at all when he heard of it. But penalties on cancellations of risk run reservations by the carrier were so heavy that he couldn't simply cross Kambine off the passenger list. They'd have to get him there; but he would give Emris authorities the word on the financier's underhanded plot immediately on arrival. That might be very poor form by Uldune's standards; but the captain couldn't care less.

The last of them was one Laes Yango, a big-boned, dour faced businessman who stood a good head taller than the captain and had little to say about himself. He was shepherding some crates of extremely valuable hyperelectronic equipment through the Chaladoor, would transfer with them on Emris for a destination several weeks' travel beyond. Yango, the captain thought, should create no problems aboard. He wasn't so sure of the other two.

When it came to problems on Uldune, he still had a number to handle there. But they were business matters and would be resolved. Sunnat appeared to have realized at last she'd been making something of a nuisance of herself and was now behaving more sensibly. She was still very cordial to the captain whenever they met; and he trusted he hadn't given the tall redhead any offense.

FIVE.

SEDMON THE SIXTH, the Daal of Uldune, was a lean, dark man, tall for the Uldunese strain, with pointed, foxy features and brooding, intelligent eyes.

He was a busy ruler who had never been known to indulge in the frivolity of purely social engagements. Yet he always found time to grant an audience to Hulik do Eldel when she requested it. Hulik was a very beautiful young woman who, though native to Uldune, had spent more than half her life in the Empire.

She had been an agent of Central Imperial Intelligence for several years; and she and the Daal had been acquainted for about the same length of time. Sometimes they worked together, sometimes at cross-purposes. In either situation, they often found it useful to pool their information, up to a point.

Hulik had arrived early that morning at the House of Thunders, the ancient and formidable castle of the Daals in the highlands south of Zergandol, and met Sedmon in his private suite in one of the upper levels of the castle.

"Do you know," asked Hulik, who could be very direct when she felt like, it, "whether this rumored super spacedrive of Karres really exists?"

"I have no proof of it," the Daal admitted. But I would not be surprised to discover it exists."

"And if you did, how badly would you want it?"

Sedmon shrugged. "Not badly enough to do anything likely to antagonize Karres," he said.

"Or to antagonize the Empire?"

"Depending on the circumstances," the Daal said cautiously, "I might risk the anger of the Empire."

Hulik was silent a moment. "The Imperium," she said then, "very much wants to have this drive. And it does not care in the least whether it antagonizes Karres, or anybody else, in the process of getting it."

Sedmon shrugged again. "Each to his taste," he said dryly.

Hulik smiled. "Yes," she said, "and one thing at a time. To begin with then, do you believe a ship we have both shown interest in during the past weeks is the one equipped with this mysterious drive?"

The Daal scratched his neck. "I'm inclined to believe the ship was equipped with the drive," he acknowledged. "I'm not sure it still is." He blinked at her. "What are you supposed to do?"

"Either obtain the drive or keep trace of the ship until other agents can obtain it," Hulik said promptly.