A "thwok-thwok" of ornithopter wings sounded high to the right behind Hawat's group. The craft came over the cliff wall above them—an Atreides 'thopter with Harkonnen battle colors splashed on it. The 'thopter swooped toward the men crossing the sink.

The group there stopped on a dune crest, waved.

The 'thopter circled once over them in a tight curve, came back for a dust-shrouded landing in front of the Fremen. Five men swarmed from the 'thopter and Hawat saw the dust-repellent shimmering of shields and, in their motions, the hard competence of Sardaukar.

"Aiihh! They use their stupid shields," the Fremen beside Hawat hissed. He glanced toward the open south wall of the sink.

"They are Sardaukar," Hawat whispered.

"Good."

The Sardaukar approached the waiting group of Fremen in an enclosing half-circle. Sun glinted on blades held ready. The Fremen stood in a compact group, apparently indifferent.

Abruptly, the sand around the two groups sprouted Fremen. They were at the ornithopter, then in it. Where the two groups had met at the dune crest, a dust cloud partly obscured violent motion.

Presently, dust settled. Only Fremen remained standing.

"They left only three men in their 'thopter," the Fremen beside Hawat said. "That was fortunate. I don't believe we had to damage the craft in taking it."

Behind Hawat, one of his men whispered: "Those were Sardaukar!"

"Did you notice how well they fought?" the Fremen asked.

Hawat took a deep breath. He smelled the burned dust around him, felt the heat, the dryness. In a voice to match that dryness, he said: "Yes, they fought well, indeed."

The captured 'thopter took off with a lurching flap of wings, angled upward to the south in a steep, wing-tucked climb.

So these Fremen can handle 'thopters, too , Hawat thought.

On the distant dune, a Fremen waved a square of green cloth: once... twice.

"More come!" the Fremen beside Hawat barked. "Be ready. I'd hoped to have us away without more inconvenience."

Inconvenience! Hawat thought.

He saw two more 'thopters swooping from high in the west onto an area of sand suddenly devoid of visible Fremen. Only eight splotches of blue—the bodies of the Sardaukar in Harkonnen uniforms—remained at the scene of violence.

Another 'thopter glided in over the cliff wall above Hawat. He drew in a sharp breath as he saw it—a big troop carrier. It flew with the slow, spread-wing heaviness of a full load—like a giant bird coming to its nest.

In the distance, the purple finger of a lasgun beam flicked from one of the diving 'thopters. It laced across the sand, raising a sharp trail of dust.

"The cowards!" the Fremen beside Hawat rasped.

The troop carrier settled toward the patch of blue-clad bodies. Its wings crept out to full reach, began the cupping action of a quick stop.

Hawat's attention was caught by a flash of sun on metal to the south, a 'thopter plummeting there in a power dive, wings folded flat against its sides, its jets a golden flare against the dark silvered gray of the sky. It plunged like an arrow toward the troop carrier which was unshielded because of the lasgun activity around it. Straight into the carrier the diving 'thopter plunged.

A flaming roar shook the basin. Rocks tumbled from the cliff walls all around. A geyser of red-orange shot skyward from the sand where the carrier and its companion 'thopters had been—everything there caught in the flame.

It was the Fremen who took off in that captured 'thopter , Hawat thought. He deliberately sacrificed himself to get that carrier. Great Mother! What are these Fremen?

"A reasonable exchange," said the Fremen beside Hawat. "There must've been three hundred men in that carrier. Now, we must see to their water and make plans to get another aircraft." He started to step out of their rock-shadowed concealment.

A rain of blue uniforms came over the cliff wall in front of him, falling in low-suspensor slowness. In the flashing instant, Hawat had time to see that they were Sardaukar, hard faces set in battle frenzy, that they were unshielded and each carried a knife in one hand, a stunner in the other.

A thrown knife caught Hawat's Fremen companion in the throat, hurling him backward, twisting face down. Hawat had only time to draw his own knife before blackness of a stunner projectile felled him.

As the ornithopters glided out of the night above them, Paul grabbed his mother's arm, snapped: "Don't move!"

Then he saw the lead craft in the moonlight, the way its wings cupped to brake for landing, the reckless dash of the hands at the controls.

"It's Idaho ," he breathed.

The craft and its companions settled into the basin like a covey of birds coming to nest. Idaho was out of his 'thopter and running toward them before the dust settled. Two figures in Fremen robes followed him. Paul recognized one: the tall, sandy-bearded Kynes.

"This way!" Kynes called and he veered left.

Behind Kynes, other Fremen were throwing fabric covers over their ornithopters. The craft became a row of shallow dunes.

Idaho skidded to a stop in front of Paul, saluted. "M'Lord, the Fremen have a temporary hiding place nearby where we—"

"What about that back there?"

Paul pointed to the violence above the distant cliff—the jetflares, the purple beams of lasguns lacing the desert.

A rare smile touched Idaho 's round, placid face. "M'Lord... Sire, I've left them a little sur—"

Glaring white light filled the desert—bright as a sun, etching their shadows onto the rock floor of the ledge. In one sweeping motion, Idaho had Paul's arm in one hand, Jessica's shoulder in the other, hurling them down off the ledge into the basin. They sprawled together in the sand as the roar of an explosion thundered over them. Its shock wave tumbled chips off the rock ledge they had vacated.

Idaho sat up, brushed sand from himself.

"Not the family atomics!" Jessica said. "I thought—"

"You planted a shield back there," Paul said.

"A big one turned to full force," Idaho said. "A lasgun beam touched it and..." He shrugged.

"Subatomic fusion," Jessica said. "That's a dangerous weapon."

"Not weapon, m'Lady, defense. That scum will think twice before using lasguns another time."

The Fremen from the ornithopters stopped above them. One called in a low voice: "We should get under cover, friends."

Paul got to his feet as Idaho helped Jessica up.

"That blast will attract considerable attention, Sire," Idaho said.

Sire , Paul thought.

The word had such a strange sound when directed at him. Sire had always been his father.

He felt himself touched briefly by his powers of prescience, seeing himself infected by the wild race consciousness that was moving the human universe toward chaos. The vision left him shaken, and he allowed Idaho to guide him along the edge of the basin to a rock projection. Fremen there were opening a way down into the sand with their compaction tools.