He could hear sandtrout dropping into the qanat, the swirl of predators eating them. Water softened the sandtrout, made it pliable. Children learned this early. A bit of saliva teased out the sweet syrup. Leto listened to the splashing. This was a migration of sandtrout come up to the open water, but they could not contain a flowing qanat patrolled by predator fish.

Still they came; still they splashed.

Leto groped on the sand with his right hand until his fingers encountered the leathery skin of a sandtrout. It was the large one he had expected. The creature didn't try to evade him, but moved eagerly onto his flesh. He explored its outline with his free hand - roughly diamond-shaped. It had no head, no extremities, no eyes, yet it could find water unerringly. With its fellows it could join body to body, locking one on another by the coarse interlacings of extruded cilia until the whole became one large sack-organism enclosing the water, walling off the "poison" from the giant which the sandtrout would become: Shai-Hulud.

The sandtrout squirmed on his hand, elongating, stretching. As it moved, he felt a counterpart elongating and stretching of the vision he had chosen. This thread, not that one. He felt the sandtrout becoming thin, covering more and more of his hand. No sandtrout had ever before encountered a hand such as this one, every cell supersaturated with spice. No other human had ever before lived and reasoned in such a condition. Delicately Leto adjusted his enzyme balance, drawing on the illuminated sureness he'd gained in spice trance. The knowledge from those uncounted lifetimes which blended themselves within him provided the certainty through which he chose the precise adjustments, slaving off the death from an overdose which would engulf him if he relaxed his watchfulness for only a heartbeat. And at the same time he blended himself with the sandtrout, feeding on it, feeding it, learning it. His trance vision provided the template and he followed it precisely.

Leto felt the sandtrout grow thin, spreading itself over more and more of his hand, reaching up his arm. He located another, placed it over the first one. Contact ignited a frenzied squirming in the creatures. Their cilia locked and they became a single membrane which enclosed him to the elbow. The sandtrout adjusted to the living glove of childhood play, but thinner and more sensitive as he lured it into the role of a skin symbiote. He reached down with the living glove, felt sand, each grain distinct to his senses. This was no longer sandtrout; it was tougher, stronger. And it would grow stronger and stronger... His groping hand encountered another sandtrout which whipped itself into union with the first two and adapted itself to the new role. Leathery softness insinuated itself up his arm to his shoulder.

With a terrible singleness of concentration he achieved the union of his new skin with his body, preventing rejection. No corner of his attention was left to dwell upon the terrifying consequences of what he did here. Only the necessities of his trance vision mattered. Only the Golden Path could come from this ordeal.

Leto shed his robe and lay naked upon the sand, his gloved arm outstretched into the path of migrating sandtrout. He remembered that once he and Ghanima had caught a sandtrout, abraded it against the sand until it contracted into the child-worm, a stiff tube, its interior pregnant with the green syrup. One bit gently upon the end and sucked swiftly before the wound was healed, gaining the few drops of sweetness.

They were all over his body now. He could feel the pulse of his blood against the living membrane. One tried to cover his face, but he moved it roughly until it elongated into a thin roll. The thing grew much longer than the child-worm, remaining flexible. Leto bit the end of it, tasted a thin stream of sweetness which continued far longer than any Fremen had ever before experienced. He could feel energy from the sweetness flow through him. A curious excitement suffused his body. He was kept busy for a time rolling the membrane away from his face until he'd built up a stiff ridge circling from jaw to forehead and leaving his ears exposed.

Now the vision must be tested.

He got to his feet, turned to run back toward the hut and, as he moved, found his feet moving too fast for him to balance. He plunged into the sand, rolled and leaped to his feet. The leap took him two meters off the sand and, when he fell back, trying to walk, he again moved too fast.

Stop! he commanded himself. He fell into the prana-bindu forced relaxation, gathering his senses into the pool of consciousness. This focused the inward ripples of the constant-now through which he experienced Time, and he allowed the vision-elation to warm him. The membrane worked precisely as the vision had predicted.

My skin is not my own.

But his muscles took some training to live with this amplified movement. When he walked, he fell, rolling. Presently he sat. In the quiet, the ridge below his jaw tried to become a membrane covering his mouth. He spat against it and bit, tasting the sweet syrup. It rolled downward to the pressure of his hand.

Enough time had passed to form the union with his body. Leto stretched flat and turned onto his face. He began to crawl, rasping the membrane against the sand. He could feel the sand distinctly, but nothing abraded his own flesh. With only a few swimming movements he traversed fifty meters of sand. The physical reaction was a friction-induced warming sensation.

The membrane no longer tried to cover his nose and mouth, but now he faced the second major step onto his Golden Path. His exertions had taken him beyond the qanat into the canyon where the trapped worm stayed. He heard it hissing toward him, attracted by his movements.

Leto leaped to his feet, intending to stand and wait, but the amplified movement sent him sprawling twenty meters farther into the canyon. Controlling his reactions with terrible effort, he sat back onto his haunches, straightened. Now the sand began to swell directly in front of him, rising up in a monstrous starlit curve. Sand opened only two body lengths from him. Crystal teeth flashed in the dim light. He saw the yawning mouth-cavern with, far back, the ambient movement of dim flame. The overpowering redolence of the spice swept over him. But the worm had stopped. It remained in front of him as First Moon lifted over the butte. The light reflected off the worm's teeth outlining the faery glow of chemical fires deep within the creature.

So deep was the inbred Fremen fear that Leto found himself torn by a desire to flee. But his vision held him motionless, fascinated by this prolonged moment. No one had ever before stood this close to the mouth of a living worm and survived. Gently Leto moved his right foot, met a sand ridge and, reacting too quickly, was propelled toward the worm's mouth. He came to a stop on his knees.

Still the worm did not move.

It sensed only the sandtrout and would not attack the deep-sand vector of its own kind. The worm would attack another worm in its territory and would come to exposed spice. Only a water barrier stopped it - and sandtrout, encapsulating water, were a water barrier.

Experimentally, Leto moved a hand toward that awesome mouth. The worm drew back a full meter.

Confidence restored, Leto turned away from the worm and began teaching his muscles to live with their new power. Cautiously he walked back toward the qanat. The worm remained motionless behind him. When Leto was beyond the water barrier he leaped with joy, went sailing ten meters across the sand, sprawled, rolled, laughed.

Light flared on the sand as the hut's doorseal was breached. Sabiha stood outlined in the yellow and purple glow of the lamp, staring out at him.

Laughing, Leto ran back across the qanat, stopped in front of the worm, turned and faced her with his arms outstretched.