It was as it had been three times before - he lay naked and unarmed in a strange dimension, the molecular structure of his brain so altered by the computer, the neurons and nucleic acids and proteins so scrambled and rearranged, that his cerebral cortex was in effect brand new. He could perceive a new world, a new dimension that was denied to men with normal brains. The human brain was an unexplored abyss: Lord Leighton calculated that the permutations were unlimited; there were thousands upon thousands of new dimensions into which Blade might venture.

Which one now? Where was he? Could he survive?

Richard Blade was already a different person in many ways. He had the same brawn and good looks, the enormous musculature that stood him in such good stead, the rough black stubble that grew fast and would soon become a beard. He retained his memory of Home Dimension better now than he had at first, and His Lordship had succeeded in developing a "memory bank" in Blade's unconscious. He would not have to consciously strain to remember in this new Dimension X - it would all be there for debriefing when, and always that terrible if, the computer found him again and snatched him safely back to HD.

But above all Blade was now a cunning human animal. Survive. There was sure to be danger. Isolate it, identify it, cope with it. Survive.

The slight pain in his head vanished. Blade lay on dirty brown sand. He could smell salt water and could hear the faint sound of waves. He was near the sea. Then a new sound - a feral clicking sound, a gnashing, menacing sound that was very close by.

Blade watched them closing in on him. A ring of crabs.

They had dull brown backs and yellow bellies and they were as big as wolf hounds. They clashed and skittered and watched him with nasty gleaming eyes. They formed a circle and gradually they crept inward.

Blade leaped to his feet. The giant crabs scuttled back in hasty sidewinder movement, clashing great pincers at him. Blade stood in the circle and watched them, at the same time casting about for a weapon. There were a dozen of the crabs and if they all attacked at once his stay in this new dimension would be brief.

The crabs stopped retreating. They watched him, weighing and considering, and he could read intelligence in the cruel eyes. These were no ordinary crabs, quite apart from size. These monsters could think!

There was a good sized rock buried in the sand at Blade's feet. He began to dig it out even as he made a rapid survey of the place. To his left a sea lapped in placidly. The water had a purple tinge to it. Patches of yellow fog drifted here and there. To his right he could see sere brown mountains in the distance.

Scattered up and down the beach, as far as he could see in either direction, were stout poles set into the. sand. From each pole hung a skeleton, some of them gleaming fresh and blue-white, some of them old and bleached. The crabs ate well.

They were hungry again. They began to tighten the circle about Blade. He picked up the rock, his big muscles straining, and raised it high over his head. The leader crab, a bit forward of his fellows, paused and the little eyes stared at Blade.

Blade measured the distance carefully. He took a step and heaved the rock. The crab scuttled back, but not in time. There was a nasty liquid sound, as though one had stepped on an enormous cockroach. The carapace shattered and a bloody ooze leaked out. A fetid smell filled the air. Blade felt sick. The remaining crabs fell on their dying leader like a pack of wolves.

Blade ran, vaulted the line of crabs and kept running. At full tilt down the long beach, naked and more than a little afraid, and under a sky as leaden as his spirits. It was a bad beginning in this new Dimension X.

He paused to examine one of the fresher skeletons lashed to the poles. The crabs had left nothing but gnawed bones.

Blade grimaced. What crime could the man have committed, to be so horribly punished?

It had been a small man, judging from the skeleton, and he had died as naked as Blade was now. No sign of cloth or metal or leather. Blade passed on to the next skeleton. Another small man.

He reached the end of the line of poles. The brown beach stretched away into mist. The purple sea, polka dotted with fog, made lonely sounds on the sand. Arid mountains looked inland. Lonely. Desolate. Only skeletons for company. Blade glanced behind him. The crabs were following him.

The cry came faint and forlorn from somewhere ahead of him. Blade stared down the beach. Nothing there. The crabs were getting closer.

Again the cry. A moaning sound filled with anguish and longing and fear. Blade shivered, though he was not cold. There was nothing out there. He moved on down the beach, keeping his distance from the pursuing crabs.

Once more the cry. Blade halted and stared. It was a human sound, what was left of it, and now it came from nearby. But where? He squinted through fog now rolling in from the purple sea.

"Help me! For the love of Bek, help me!"

Blade spotted it. A dark splotch on the sand. It could have been a melon or a ball, a mossy rock. It was a head. A head that moved feebly and a mouth that gaped and cried. "Help me - for the love of Bek, help me!"

The big man glanced back. The crabs were closer now. He ran toward the dark blob on the sand.

The man was buried to his neck in the sand. When he opened his mouth to cry out sand fell into his mouth.

Blade knelt beside the man. Long dark eyes stared up at him in anguish. The head was long and narrow, bald except for a dark babyish fuzz. The eyes implored.

The mouth said: "Save me, master. In Bek's name save me."

Blade looked over his shoulder. The crabs were coming along at a rapid pace. Blade began to dig with his hands. Slow going. He found a shell and began scooping. Sweat popped out on him.

"Try to help yourself," Blade grunted. "Twist and turn, push with your feet. Use your hands and elbows."

"I cannot. I am bound."

Blade cursed and looked back. The nearest crab was now only fifty feet away. The man was only half uncovered. Blade dropped the shell and ran to a solitary pole that stood some ten feet away. It was eight feet high, of iron hard wood and a foot in diameter. It was fitted with iron rings and straps. As he stooped, put his arms about the pole and began to pull, Blade wondered why the man had been buried instead of bound to the pole as obviously intended?

Blade strained. The pole was set deep into the sand. Sweat greased Blade's face and trickled down his body. The great thews in his arms and shoulders writhed like snakes under the smooth hide. Slowly Blade came upright, the pillars of his thighs bulging as he pulled the post out of the clinging sand.

The buried man screamed. Blade, the post on his shoulder, spun around. The crabs had arrived. One was darting at the helpless man. A great claw clashed and opened and reached out to tear away the face. Blade ran.

He rammed the pointed end of the pole through the crab just in time. The impaled creature gave a screaming sound and wriggled in agony. Blade raised the pole and let the dying thing slide off. He used the pole to push the shattered carapace closer to the other waiting crabs. They fell on it in a fury of slavering and gobbling sounds.

Blade went back to digging, keeping an eye on the gorging crabs. The smell was terrible.

The man's hands were bound with leathern thongs. Blade sawed them loose with a sharp edge of shell. "Now help yourself," he commanded. "Those crabs will be at us again as soon as they finish their brother."

The man tried, groaning with pain. He nodded toward the ravening cluster of giant crabs. "The capado are bad, master, but not so bad as those who set me here. We must hurry. They will return soon to make sure I am dead."

Blade was flinging sand in a frenzy. "Who will return?"

"The slave patrol, sire. Who else? With Equebus in command. Equebus who is the crudest man in all Sarma - may Bek strike him with fire and burn him slowly for many years."

Blade dug, panting hard. "You are a slave, then?"

"I was, sire. I was - but I escaped. I did not want to be a slave. I was caught. That is why I am here for the capado to eat, why I was buried in the sand instead of being lashed to the post. So it would take the capado longer to find me, so I would suffer longer in my mind. For the thinking about suffering is as bad, or worse, than the suffering itself. Equebus, the cruel rogue, knows - "

"Be quiet man, and dig - dig! We can talk later."

"I am nearly free. A little more about my legs."

Blade picked up the post and speared another crab. The feast began again. He went back to the man, made a swift survey, then seized him beneath the armpits and yanked him out of the sand. When he let him down the man collapsed on the sand. Blade knelt and began to massage the thin hairless legs. These Sarmaians, for what he had seen so far, were all fragile people. But then he had not seen many of them - one live one and fifty skeletons. None of that mattered right now. First things first. Stay alive and out of danger until he could get his bearings.

He killed one more crab, fed it to its kin, then pulled the slight man to his feet. The long opaque eyes regarded Blade with a touch of wonderment and fear. The little man edged away a step or two from this brawny hirsute giant.

Blade saw it and frowned. Best get matters straight at once. He had a sense of sand running fast from the glass, and he still naked and without arms or any helpful information.

"You need not fear me," Blade said. "Have I not just saved your life?"

The man looked at the crabs, writhing and crunching, and he shivered. Nodded. "You did, sire. I am grateful."

Blade smiled and nodded, then extended his big hand. The man stared at the hand, but made no effort to touch it. Blade laughed.

"In my land we have a custom - when two men decide to trust and help each other they touch hands. Now, I have helped you and I would have you help me. I am a stranger in your land and I need help. As much as you needed it just now. Do you agree? Will you touch my hand?"