Alia lunged with the knife.

Leto leaped almost to the ceiling, struck with his left foot. It caught Alia's head a glancing blow and sent her sprawling with a bloody mark on her forehead. She lost her grip on the knife and it skidded across the floor. Alia scrambled after the knife, but found Leto standing in front of her.

Alia hesitated, called up everything she knew of Bene Gesserit training. She came off the floor, body loose and poised.

Once more Leto advanced upon her.

Alia feinted to the left but her right shoulder came up and her right foot shot out in a toe-pointing kick which could disembowel a man if it struck precisely.

Leto caught the blow on his arm, grabbed the foot, and picked her up by it, swinging her around his head. The speed with which he swung her sent a flapping, hissing sound through the room as her robe beat against her body.

The others ducked away.

Alia screamed and screamed, but still she continued to swing around and around and around. Presently she fell silent.

Slowly Leto reduced the speed of her whirling, dropped her gently to the floor. She lay in a panting bundle.

Leto bent over her. "I could've thrown you through a wall," he said. "Perhaps that would've been best, but we're now at the center of the struggle. You deserve your chance."

Alia's eyes darted wildly from side to side.

"I have conquered those inner lives," Leto said. "Look at Ghani. She, too, can -"

Ghanima interrupted: "Alia, I can show you -"

"No!" The word was wrenched from Alia. Her chest heaved and voices began to pour from her mouth. They were disconnected, cursing, pleading. "You see! Why didn't you listen?" And again: "Why're you doing this? What's happening?" And another voice: "Stop them! Make them stop!"

Jessica covered her eyes, felt Farad'n's hand steady her.

Still Alia raved: "I'll kill you!" Hideous curses erupted from her. "I'll drink your blood!" The sounds of many languages began to pour from her, all jumbled and confused.

The huddled guards in the outer passage made the sign of the worm, then held clenched fists beside their ears. She was possessed!

Leto stood, shaking his head. He stepped to the window and with three swift blows shattered the supposedly unbreakable crystal-reinforced glass from its frame.

A sly look came over Alia's face. Jessica heard something like her own voice come from that twisting mouth, a parody of Bene Gesserit control. "All of you! Stay where you are!"

Jessica, lowering her hands, found them damp with tears.

Alia rolled to her knees, lurched to her feet.

"Don't you know who I am?" she demanded. It was her old voice, the sweet and lilting voice of the youthful Alia who was no more. "Why're you all looking at me that way?" She turned pleading eyes to Jessica. "Mother, make them stop it."

Jessica could only shake her head from side to side, consumed by ultimate horror. All of the old Bene Gesserit warnings were true. She looked at Leto and Ghani standing side by side near Alia. What did those warnings mean for these poor twins?

"Grandmother," Leto said, and there was pleading in his voice. "Must we have a Trial of Possession?"

"Who are you to speak of trial?" Alia asked, and her voice was that of a querulous man, an autocratic and sensual man far gone in self-indulgence.

Both Leto and Ghanima recognized the voice. The Old Baron Harkonnen. Ghanima heard the same voice begin to echo in her own head, but the inner gate closed and she sensed her mother standing there.

Jessica remained silent.

"Then the decision is mine," Leto said. "And the choice is yours, Alia. Trial of Possession, or..." He nodded toward the open window.

"Who're you to give me a choice?" Alia demanded, and it was still the voice of the Old Baron.

"Demon!" Ghanima screamed. "Let her make her own choice!"

"Mother," Alia pleaded in her little-girl tones. "Mother, what're they doing? What do you want me to do? Help me."

"Help yourself," Leto ordered and, for just an instant, he saw the shattered presence of his aunt in her eyes, a glaring hopelessness which peered out at him and was gone. But her body moved, a sticklike, thrusting walk. She wavered, stumbled, veered from her path but returned to it, nearer and nearer the open window.

Now the voice of the Old Baron raged from her lips: "Stop! Stop it, I say! I command you! Stop it! Feel this!" Alia clutched her head, stumbled closer to the window. She had the sill against her thighs then, but the voice still raved. "Don't do this! Stop it and I'll help you. I have a plan. Listen to me. Stop it, I say. Wait!" But Alia pulled her hands away from her head, clutched the broken casement. In one jerking motion, she pulled herself over the sill and was gone. Not even a screech came from her as she fell.

In the room they heard the crowd shout, the sodden thump as Alia struck the steps far below.

Leto looked at Jessica. "We told you to pity her."

Jessica turned and buried her face in Farad'n's tunic.

"He runs at night, cousin," Ghanima said. "He runs. Have you seen him run?"

"No," Farad'n said.

He waited with Ghanima outside the small audience hall of the Keep where Leto had called them to attend. Tyekanik stood at one side, uncomfortable with the Lady Jessica, who appeared withdrawn, as though her mind lived in another place. It was hardly an hour past the morning meal, but already many things had been set moving - a summons to the Guild, messages to CHOAM and the Landsraad.

Farad'n found it difficult to understand these Atreides. The Lady Jessica had warned him, but still the reality of them puzzled him. They still talked of the betrothal, although most political reasons for it seemed to have dissolved. Leto would assume the throne; there appeared little doubt of that. His odd living skin would have to be removed, of course... but, in time...

"He runs to tire himself," Ghanima said. "He's Kralizec embodied. No wind ever ran as he runs. He's a blur atop the dunes. I've seen him. He runs and runs. And when he has exhausted himself at last, he returns and rests his head in my lap. 'Ask our mother within to find a way for me to die,' he pleads."

Farad'n stared at her. In the week since the riot in the plaza, the Keep had moved to strange rhythms, mysterious comings and goings; stories of bitter fighting beyond the Shield Wall came to him through Tyekanik, whose military advice had been asked.

"I don't understand you," Farad'n said. "Find a way for him to die?"

"He asked me to prepare you," Ghanima said. Not for the first time, she was struck by the curious innocence of this Corrino Prince. Was that Jessica's doing, or something born in him?

"For what?"

"He's no longer human," Ghanima said. "Yesterday you asked when he was going to remove the living skin? Never. It's part of him now and he's part of it. Leto estimates he has perhaps four thousand years before metamorphosis destroys him."

Farad'n tried to swallow in a dry throat.

"You see why he runs?" Ghanima asked.

"But if he'll live so long and be so -"

"Because the memory of being human is so rich in him. Think of all those lives, cousin. No. You can't imagine what that is because you've no experience of it. But I know. I can imagine his pain. He gives more than anyone ever gave before. Our father walked into the desert trying to escape it. Alia became Abomination in fear of it. Our grandmother has only the blurred infancy of this condition, yet must use every Bene Gesserit wile to live with it - which is what Reverend Mother training amounts to anyway. But Leto! He's all alone, never to be duplicated."