Pauncho put a huge hand, the back of which was covered with thick dark-red hairs, against Barney's face. 'One shove, and you can solo without wings.'

Doc Caliban said, 'We haven't time for that.' Pauncho backed away, and Barney climbed in. Doc Caliban pulled up the latch of the door, but the door would not swing out. He then started down the steps, the little gas-operated gun in his big hand. Behind him on the stairway, which was too narrow for two men abreast, were Pauncho and Barney. Each held a gun like Doc's.

They went down three complete windings of the cork-screw staircase before coming onto a broader landing. Doc tried the wooden door here, and it opened noiselessly, its hinges having been recently oiled. The room beyond was huge, reached by a short flight of steps leading downward. At one end was a big canopied bed. The walls were naked granite blocks except where covered by huge tapestries. There were a few pieces of massive oak furniture. Heads glared down from the walls: elks, elephants, rhinoceros, African buffalo and American bison, wolf, lion, tiger, leopard, jaguar, kodiak bear. They were fine specimens but nothing extraordinary. They could be found in the game room of any man with money and time and the need to slaughter.

But on a table in a corner, near the huge fireplace on the western wall, was a mounted animal that he had never seen outside some drawings based on speculation and a photograph that could be faked.

‘Tatzelwurm,' he said.

It was a lizardlike reptile with a long slim snakelike body about five and a half feet long. The skin was brownish on top and somewhat lighter on the bottom. Its four legs were very short. The heavy and blunt-snouted head merged into the thick body with no bridge of a neck. The eyes were large and round and a light green.

'What's a Tatzelwurm?' Pauncho said. He stood beside the specimen, and the two, except for Pauncho's clothes, would have made a prehistoric tableau. He could have been a Neanderthal and the lizard a left-over from even earlier days.

'It's a reptile that's been reported as living in the Alps,' Doc said. 'There have been too many witnesses with similar descriptions over too long a period of time for any doubt, about its existence. It could be a form of giant salamander or skink. But the longest ever seen was about three feet long. This is a monster. I wonder where Iwaldi got this? And I wonder how many years ago?'

There was enough dust on the furniture and specimens to indicate that this room was not much used. Nor was there anything of value for the business at hand.

Caliban, however, went over the room as swiftly as he could, looking for hidden entrances to tunnels and electronic detection devices. A few minutes later, he led Pauncho and Barney out of the room and down the winding staircase. On the next landing, they found a hallway running to the north and walked down it. There were three doors along the hall and one at the end. Caliban looked into the first three and found them empty rooms with piles of boxes and furniture. The door at the end revealed another huge bedroom. This was furnished with expensive tapestries and a bed and table like the one above, but it lacked the mounted heads. The fireplace was glowing with coals, and the bed was in disorder and still bore the impression of a body.

A closet door was behind a tall wooden screen on which was painted a medieval battle scene. The clothes hanging in the closet were those of a woman, but the variety was amazing.

'She sure must go to a lot of costume balls,' Pauncho said. 'Or else she's a collector of historical clothes.'

The closet was big enough to have made a satisfactory bedroom in most houses. By walking down the various racks, the three walked through history, starting approximately at the middle of the seventeenth century. Most of the clothing was preserved in airtight plastic bags filled with gas, probably helium.

This was interesting and somewhat puzzling, but they were not inside the castle for a Cook's tour. Caliban said, 'Go!', being one who hates to waste words, and they left the closet and started toward the door to the hallway.

There was a slight chuffling sound behind them. It was heard only by Doc Caliban, whose ears had been sensitised by a chemical he had invented. He whirled, and the others began to turn as soon as he started to move. A section of the stone wall had slid smoothly aside and out of the blackness leaped huge grey forms. They were Canadian timber wolves, and they uttered no sound except for the click of nails on the stone floor. On top of each of their heads was a hemisphere of some grey material about the size of a ping-pong ball cut in half.

Ten bounded out of the hole, their jaws open and slavering, the white teeth ready to clamp down, driven by jaws powerful enough to take off a man's arm with one bite.

The first wolf, arcing toward Barney, who had been at the end of the line, suddenly found the giant with the dark red hair and the peculiar grey-green-and-yellow eyes at the end of its leap. A hand with muscles like pythons seized the wolf by the throat and Caliban whirled. The wolf shot out of the suddenly opened hand and went past Barney and Pauncho, its tail flicking Barney's face. It crashed into the door and fell in a limp heap.

Caliban kept on whirling, and the edge of his palm struck the second wolf in its midleap and broke its neck with a sound as of an axe chopping a tree.

Pauncho knew the necessity of silence, but he found it almost impossible to throttle himself when he was in a fight to the death. His first cry was like a bull fiddle being strummed way down in a mountain hollow, and the strummings came faster and faster but somewhat higher as the struggle continued. His enormous fists smashed into the tender noses of the beasts or on top of their heads, crushing the delicate hemispheres and stunning the brains beneath. Twice he shot animals with the gun in his left hand. Twice he went down, bowled backward by a body the jaws of which closed on his jacketed plastic chain-mailed arm.

Barney had shifted his gun to his left hand too, and a six-inch knife had suddenly appeared in his right. Like a ballet dancer, he whirled among the wolves, bending, bounding, thrusting. Then he went down with the impact of a huge male on his shoulders, and two others jumped in to savage him.

Pauncho, roaring, kicked one of the wolves so hard in the rear that he raised it off the floor and sent it rolling over the tangle of Barney and wolves. The wolf did not get up again. Then Pauncho seized a tail and dragged the wolf, its legs pumping frantically to keep its grip on the floor, away from Barney. The wolf turned to bite Pauncho, but Pauncho fell on it with his hands around its throat. Another wolf leaped on his back only to be lifted up and smashed against the wall by Doc Caliban.

Barney yelled when the teeth of a wolf exerted very painful pressure on his calf. They would have cut through his muscles if it had not been for the plastic chain-mailed longjohns he was wearing. Barney shot the wolf, rolled away, put up his arm to ward off another wolf, and blew its eye and a good part of its brains out.

Caliban had grabbed two wolves by the throats as they leaped together at him and banged their heads together again and again. A third fastened its teeth around his leg, tearing the cloth of his pants. The pressure of the jaws hurt Doc's leg, but he made no sound. His face expressionless, he dropped the two unconscious wolves and seized the third beast by the ears. He jerked upward so violently he tore the animal's ears off, and it let loose of him and fled back to the hole. But before it reached it, it stopped, stood trembling for a moment, then wheeled and charged Doc again.

Caliban was amazed at its behaviour. Its actions could only be accounted for by some influence from the hemisphere on top of its head.