A spot of light appeared on the deep red rug which covered the raw rock of the cave floor. The light glowed without apparent source, having its existence only on the red fabric surface woven of spice fiber. A questing circle about two centimeters in diameter, it moved erratically - now elongated, now an oval. Encountering the deep green side of a bed, it leaped upward, folded itself across the bed's surface.

Beneath the green covering lay a child with rusty hair, face still round with baby fat, a generous mouth - a figure lacking the lean sparseness of Fremen tradition, but not as water-fat as an off-worlder. As the light passed across closed eyelids, the small figure stirred. The light winked out.

Now there was only the sound of even breathing and, faint behind it, a reassuring drip-drip-drip of water collecting in a catch basin from the windstill far above the cave.

Again the light appeared in the chamber - slightly larger, a few lumens brighter. This time there was a suggestion of source and movement to it: a hooded figure filled the arched doorway at the chamber's edge and the light originated there. Once more the light flowed around the chamber, testing, questing. There was a sense of menace in it, a restless dissatisfaction. It avoided the sleeping child, paused on the gridded air inlet at an upper corner, probed a bulge in the green and gold wall hangings which softened the enclosing rock.

Presently the light winked out. The hooded figure moved with a betraying swish of fabric, took up a station at one side of the arched doorway. Anyone aware of the routine here in Sietch Tabr would have suspected at once that this must be Stilgar, Naib of the Sietch, guardian of the orphaned twins who would one day take up the mantle of their father, Paul Muad'Dib. Stilgar often made night inspections of the twins' quarters, always going first to the chamber where Ghanima slept and ending here in the adjoining room, where he could reassure himself that Leto was not threatened.

I'm an old fool, Stilgar thought.

He fingered the cold surface of the light projector before restoring it to the loop in his belt sash. The projector irritated him even while he depended upon it. The thing was a subtle instrument of the Imperium, a device to detect the presence of large living bodies. It had shown only the sleeping children in the royal bedchambers.

Stilgar knew his thoughts and emotions were like the light. He could not still a restless inner projection. Some greater power controlled that movement. It projected him into this moment where he sensed the accumulated peril. Here lay the magnet for dreams of grandeur throughout the known universe. Here lay temporal riches, secular authority and that most powerful of all mystic talismans: the divine authenticity of Muad'Dib's religious bequest. In these twins - Leto and his sister Ghanima - an awesome power focused. While they lived, Muad'Dib, though dead, lived in them.

These were not merely nine-year-old children; they were a natural force, objects of veneration and fear. They were the children of Paul Atreides, who had become Muad'Dib, the Mahdi of all the Fremen. Muad'Dib had ignited an explosion of humanity; Fremen had spread from this planet in a jihad, carrying their fervor across the human universe in a wave of religious government whose scope and ubiquitous authority had left its mark on every planet.

Yet these children of Muad'Dib are flesh and blood, Stilgar thought. Two simple thrusts of my knife would still their hearts. Their water would return to the tribe.

His wayward mind fell into turmoil at such a thought.

To kill Muad'Dib's children!

But the years had made him wise in introspection. Stilgar knew the origin of such a terrible thought. It came from the left hand of the damned, not from the right hand of the blessed. The ayat and burhan of Life held few mysteries for him. Once he'd been proud to think of himself as Fremen, to think of the desert as a friend, to name his planet Dune in his thoughts and not Arrakis, as it was marked on all of the Imperial star charts.

How simple things were when our Messiah was only a dream, he thought. By finding our Mahdi we loosed upon the universe countless messianic dreams. Every people subjugated by the jihad now dreams of a leader to come.

Stilgar glanced into the darkened bedchamber.

If my knife liberated all of those people, would they make a messiah of me?

Leto could be heard stirring restlessly in his bed.

Stilgar sighed. He had never known the Atreides grandfather whose name this child had taken. But many said the moral strength of Muad'Dib had come from that source. Would that terrifying quality of rightness skip a generation now? Stilgar found himself unable to answer this question.

He thought: Sietch Tabr is mine. I rule here. I am a Naib of the Fremen. Without me there would have been no Muad'Dib. These twins, now... through Chani, their mother and my kinswoman, my blood flows in their veins, I am there with Muad'Dib and Chani and all the others. What have we done to our universe?

Stilgar could not explain why such thoughts came to him in the night and why they made him feel so guilty. He crouched within his hooded robe. Reality was not at all like the dream. The Friendly Desert, which once had spread from pole to pole, was reduced to half its former size. The mythic paradise of spreading greenery filled him with dismay. It was not like the dream. And as his planet changed, he knew he had changed. He had become a far more subtle person than the one-time sietch chieftain. He was aware now of many things - of statecraft and profound consequences in the smallest decisions. Yet he felt this knowledge and subtlety as a thin veneer covering an iron core of simpler, more deterministic awareness. And that older core called out to him, pleaded with him for a return to cleaner values.

The morning sounds of the sietch began intruding upon his thoughts. People were beginning to move about in the cavern. He felt a breeze against his cheeks: people were going out through the doorseals into the predawn darkness. The breeze spoke of carelessness as it spoke of the time. Warren dwellers no longer maintained the tight water discipline of the old days. Why should they, when rain had been recorded on this planet, when clouds were seen, when eight Fremen had been inundated and killed by a flash flood in a wadi? Until that event, the word drowned had not existed in the language of Dune. But this was no longer Dune; this was Arrakis... and it was the morning of an eventful day.

He thought: Jessica, mother of Muad'Dib and grandmother of these royal twins, returns to our planet today. Why does she end her self-imposed exile at this time? Why does she leave the softness and security of Caladan for the dangers of Arrakis?

And there were other worries: Would she sense Stilgar's doubts? She was a Bene Gesserit witch, graduate of the Sisterhood's deepest training, and a Reverend Mother in her own right. Such females were acute and they were dangerous. Would she order him to fall upon his own knife as the Umma-Protector of Liet-Kynes had been ordered?