Then, quite suddenly, it was time to go.

The wheel of fire came rushing up from the eastern horizon. It hissed and roared, and when it reached the zenith, its roar changed to a shriek as it sideslipped and turned back, heading for the castle. The brilliance of it blotted out the moon and lighted the courtyard in a fierce glow. The stone walls of the castle reared up with every crack and cranny outlined in deep shadow by the blinding light, as if the castle were a drawing done by a heavy pencil, outlined in stark black and white.

Cornwall and Gib sprang for the wheel that raised the castle gate, Hal running swiftly to help them. The gate ratcheted slowly upward as they strained at the wheel. The circle of fire came plunging down, and the screaming and the brilliance of it seemed to fill the world to bursting. Ahead of it came a rush of blasting heat. It skimmed above the castle, barely missing the topmost turrets, then looped in the sky and started back again. The horses, loose now, were charging back and forth across the courtyard, neighing in terror. One of them stumbled and, thrown off balance, plunged through the fire, scattering smoking brands.

"The gate is high enough," said Cornwall. "Let us catch those horses."

But the horses were not about to be caught. Bunched together, screaming in panic, they were heading for the gate. Cornwall leaped for one of them, grabbing for a bridle strap. He touched it and tried to close his fingers on it, but it slipped through his grasp. The plunging forefoot of a horse caught him in the ribs and sent him spinning and falling. Bellowing in fury and disappointment, he scrambled to his feet. The horses, he saw, were hammering across the drawbridge and out onto the plain. The lashings that bound the packs on one of the saddles loosened, and the packs went flying as the horse bucked and reared to rid himself of them.

Hal was tugging at Cornwall's arm and yelling. "Let's get going. Let's get out of here."

The others were halfway across the drawbridge. Coon led them all, scampering wildly in a sidewheeling fashion, his tail held low against the ground.

"Look at him go," said Hal, disgusted. "That coon always was a coward."

The plain was lighted as brilliantly as if the sun had been in the sky, but the intensity of the glow from the screaming wheel of fire played funny tricks with shadows, turning the landscape into a mad dream-place.

Cornwall found that he was running without ever consciously having decided that he would run, running because the others were running, because there was nothing else to do, because running was the only thing that made any sense at all. Just ahead of him, Tin Bucket was stumping along in a heavy-footed way, and Cornwall was somewhat amused to find himself wondering, in a time like this, how the metal creature managed the running with three legs. Three, he told himself, was a terribly awkward number.

There was no sign of the horses, or of the Hellhounds, either. There would, of course, he told himself, be no Hellhounds here. They had started clearing out, undoubtedly, at the first appearance of the wheel of fire—they probably wouldn't stop running, he thought with a chuckle, for the next three days.

Suddenly, just ahead of him, the others were stumbling and falling, disappearing from his view. They ran into something, he told himself, they ran into a trap. He tried to stop his running, but even as he did, the ground disappeared from beneath his feet and he went plunging into nothingness. But only a few feet of nothingness, landing on his back with a thump that left him gasping for breath.

Sniveley, off a ways, was yelping. "That clumsy Bucket—he fell on top of me!"

"Mark," said Mary, "are you all right?" Her face came into view, bending over him.

He struggled to a sitting position. "I'm all right," he said. "What happened?"

"We fell into a ditch," said Mary.

Hal came along, crawling on his hands and knees. "We'd better hunker down and stay," he said. "We're well hidden here."

"There are a half a dozen wheels up there," said Mary.

"I don't believe," said Hal, "they are after us. They seem to be concentrating on the castle."

"The horses are gone," said Gib from somewhere in the shadow of the ditch, "and our supplies went with them. We're left here naked in the middle of the wilderness."

"They bucked off some of the packs," said Oliver. "We can salvage some supplies."

Sniveley's agonized voice rose in petulance. "Get off me, you hunk of iron. Let me up."

"I guess I better go," said Hal, "and see what's wrong with him."

Cornwall looked around. The walls of the ditch or hole, or whatever it might be, rose five feet or so above the level of its floor, helping to shelter them from the intense light of the spinning wheels of fire.

He crawled to the wall facing the castle and cautiously raised himself so he could peer out. There was, as Mary had said, more wheels now. They were spinning above the castle, which stood out against the landscape in a blaze of light. Their roaring had changed to a deep hum that seemed to shake his body and burrow deep into his head. As he watched, one of the castle's turrets toppled and fell down. The grinding crunch of falling stone could be heard distinctly over the humming of the wheels.

"There are five of them," said Mary. "Have you the least idea what they are?"

He didn't answer her, for how was one to know? Magic, he thought, then forced the answer back, remembering how Jones had scoffed at him for saying magic whenever he faced a situation he could not comprehend. Certainly something not in the memory of man, for in all the ancient writings he had read, there had been no mention of anything like this—although wait a minute, he told himself, wait just a goddamn minute—there had been something written and in a most unlikely place. In the Book of Ezekiel, chapter one. He tried to remember what had been written there and was unable to, although he realized that there was a lot more to it than simply wheels of fire. He should have, he told himself, spent less time with ancient manuscripts and more time with the Bible.

The wheels had spaced themselves in a circle just above the castle and were spinning rapidly, one following the other, closing in and moving down until it seemed there was just one great fiery, spinning circle suspended above the ancient structure. The deep hum rose to an eerie howling as the ring of fire picked up speed, contracting its diameter and steadily settling down to encompass the castle.

Towers and turrets were crumbling, and underneath the howling could be heard the grinding rumble of falling blocks of masonry. Blue lightning lanced out of the wheel of fire, and the sharp crackling of thunder hammered so hard against the ground that the landscape seemed to buck and weave.

Instinctively Cornwall threw up his arms to shield his head but, fascinated by the sight, did not duck his head. Mary was huddling close against him and off somewhere to his right, someone—Sniveley more than likely, he thought—was squealing in terror.

The air was laced with lightning bolts, etched with the brilliance of the flaming wheel, the very earth was bouncing and the noise was so intense it seemed in itself a force that held one in its grasp.

From the center of the circle of fire, a great cloud was rising, and as Cornwall watched, he realized that what he saw was the dust of shattered stone rising through the circle as smoke from a fire rises through a chimney.

Suddenly it was over. The wheel of fire rose swiftly in the air and separated into five smaller wheels of fire that shot quickly upward, swinging about to race to the east. In seconds they disappeared.

As quickly, the world resumed its silence, and all that could be heard were the clicking and crunching sounds of settling masonry, coming from the mound of shattered stone that marked the spot where the Castle of the Chaos Beast had stood.