The restraining hands fell from him.

Desperately, he threw himself across the altar, toward the torch-bearer. Before the creature could recoil, Jarl was upon him—smashing him down with fists and knees and shoulders; snatching the flaming brand out of his hands.

Falling over each other in their haste, the others lunged to seize Jarl.

But instead of fleeing, he leaped back onto the altar. There was a prayer in his heart—his heart in his mouth. With a wild curse, he hurled the torch straight for the vat of hell-broth.

It struck the open lid, then plunged on down into the liquid.

But even as it fell, the fumes were flaring. Flame and smoke leaped up in a roaring column. A cloudburst of liquid fire sprayed out in all directions.

The cries of the primitives exploded into one great scream of pain and terror. As Jarl threw himself flat, with the altar-stone between him and the tank, he glimpsed the reeling, flame-cased figure of his jet-masked tormentor—stumbling, falling.

Then the black smoke billowed out in nauseous, all-obscuring murk that swallowed even the thundering holocaust that still roared around what had been the tank of liquid.

Jarl rolled from the wheeled platform on which the altar rested. Bent double, he raced through the choking haze for the bulkhead. In seconds, he was fumbling his way along it to the nearest doorway ... slipping through and ramming the heavy bolt home behind him.

Ahead, a shaft and spiral stairway loomed. Panting, he sprinted upward, past level after level.