Her voice little more than a whisper, Sheeana said: "See how Shaitan obeys me, Mother?"

Odrade could feel Sheeana's control over the worm, a pulse of hidden language between child and monster. It was uncanny.

Her voice rising in impudent arrogance, Sheeana said: "I will ask Shaitan to let us ride him!" She scrambled up the slipface of the dune beside the worm.

Immediately, the great mouth lifted to follow her movements. "Stay there!" Sheeana shouted. The worm stopped.

It's not her words that command it, Odrade thought. Something else... something else...

"Mother, come with me," Sheeana called.

Thrusting Waff ahead of her, Odrade obeyed. They scrambled up the sandy slope behind Sheeana. Dislodged sand spilled down beside the waiting worm, piling up in the defile. Ahead of them, the worm's tapering tail curved along the dune crest. Sheeana led them at a sand-clotted trot to the very tip of the thing. There, she gripped the leading edge of a ring in the corrugated surface and scrambled up onto her desert beast.

More slowly, Odrade and Waff followed. The worm's warm surface felt non-organic to Odrade, as though it were some Ixian artifact.

Sheeana skipped forward along the back and squatted just behind its mouth where the rings bulged thick and wide.

"Like this," Sheeana said. She leaned forward and clutched beneath the leading edge of a ring, lifting it slightly to expose pink softness underneath.

Waff obeyed her immediately but Odrade moved with more caution, storing impressions. The ring surface was as hard as plascrete and covered with tiny encrustations. Odrade's fingers probed the softness under the leading edge. It pulsed faintly. The surface around them lifted and fell with an almost imperceptible rhythm. Odrade heard a tiny rasping with each movement.

Sheeana kicked the worm surface behind her.

"Shaitan, go!" she said.

The worm did not respond.

"Please, Shaitan," Sheeana pleaded.

Odrade heard the desperation in Sheeana's voice. The child was so confident of her Shaitan but Odrade knew that the girl had been allowed to ride only that first time. Odrade had the full story from death-wish to priestly confusion but none of it told her what would happen next.

Abruptly, the worm lurched into motion. It lifted sharply, twisted to the left and made a tight curve out of the rocky defile, then moved directly away from Dar-es-Balat into the open desert.

"We go with God!" Waff shouted.

The sound of his voice shocked Odrade. Such wildness! She sensed the power in his faith. The thwock-thwock of following ornithopters came from overhead. The wind of their passage whipped past Odrade full of ozone and the hot furnace odors stirred up by the friction of the rushing behemoth.

Odrade glanced over her shoulders at the 'thopters, thinking how easy it would be for enemies to rid this planet of a troublesome child, an equally troublesome Reverend Mother and a despised Tleilaxu - all in one violently vulnerable moment on the open desert. The priestly cabal might attempt it, she knew, hoping that Odrade's own watchers up there would be too late to prevent it.

Would curiosity and fear hold them back?

Odrade admitted to a mighty curiosity herself.

Where is this thing taking us?

Certainly, it was not headed toward Keen. She lifted her head and peered past Sheeana. On the horizon directly ahead lay that tell-tale indentation of fallen stones, that place where the Tyrant had been spilled from the surface of his faery bridge.

The place of Other Memory warning.

Abrupt revelation locked Odrade's mind. She understood the warning. The Tyrant had died at a place of his own choosing. Many deaths had left their imprint on that place but his the greatest. The Tyrant chose his peregrination route with purpose. Sheeana had not told her worm to go there. It moved that way of its own volition. The magnet of the Tyrant's endless dream drew it back to the place where the dream began.

It was a long session in the no-globe's practice hall, Duncan in a mobile cage driving the exercise, adamant that this particular training series would continue until his new body had adapted to the seven central attitudes of combat response against attack from eight directions. His green singlesuit was dark with perspiration. Twenty days they had been at this one lesson!

Teg knew the ancient lore that Duncan revived here but knew it by different names and sequencing. Before they had been into it five days, Teg doubted the superiority of modern methods. Now, he was convinced that Duncan did something completely new - mixing the old with what he had learned in the Keep.

Teg sat at his own control console, as much an observer as a participant. The consoles that guided the dangerous shadow forces in this practice had required mental adjustment by Teg, but he felt familiar with them now and moved the attack with facility and frequent inspiration.

A simmering Lucilla glanced into the hall occasionally. She watched and then left without comment. Teg did not know what Duncan was doing about the Imprinter but there was a feeling that the reawakened ghola played a delaying game with his seductress. She would not allow that to continue long, Teg knew, but it was out of his hands. Duncan no longer was "too young" for the Imprinter. That young body carried a mature male mind with experiences from which to make his own decisions.

Duncan and Teg had been on the floor with only one break all morning. Hunger pangs gnawed at Teg but he felt reluctant to halt the session. Duncan's abilities had climbed to a new level today and he was still improving.

Teg, seated in a fixed console's cage seat, twisted the attack forces into a complex maneuver, striking from left, right, and above.

The Harkonnen armory had produced an abundance of these exotic weapons and training instruments, some of which Teg had known only from historical accounts. Duncan knew them all, apparently, and with an intimacy that Teg admired. Hunter-seekers geared to penetrate a force shield were part of the shadow system they used now.

"They automatically slow down to go through the shield," Duncan explained in his young-old voice. "Too fast a strike, of course, and the shield repels."

"Shields of that type have almost gone out of fashion," Teg said. "A few societies maintain them as a kind of sport but otherwise..."

Duncan executed a riposte of blurred speed that dropped three hunter-seekers to the floor damaged enough to require the no-globe's maintenance services. He removed the cage and damped the system but left it idling while he came over to Teg, breathing deeply but easily. Looking past Teg, Duncan smiled and nodded. Teg whirled but there was only the flick of Lucilla's gown as she left them.

"It's like a duel," Duncan said. "She tries to thrust through my guard and I counterattack."

"Have a care," Teg said. "That's a full Reverend Mother."

"I've known a few of them in my time, Bashar."

Once more, Teg found himself confounded. He had been warned that he would have to readjust to this different Duncan Idaho but he had not fully anticipated the constant mental demands of that readjustment. The look in Duncan's eyes right now was disconcerting.

"Our roles are changed a bit, Bashar," Duncan said. He picked up a towel from the floor and mopped his face.