From "Manual of Muad'Dib" by the Princess Irulan

A good man but he'll have to learn to address us properly , the Duke thought.
Paul stood passively as Kynes inspected the suit. It had been an odd sensation putting on the crinkling, slick-surfaced garment. In his foreconsciousness had been the absolute knowledge that he had never before worn a stillsuit. Yet, each motion of adjusting the adhesion tabs under Gurney's inexpert guidance had seemed natural, instinctive. When he had tightened the chest to gain maximum pumping action from the motion of breathing, he had known what he did and why. When he had fitted the neck and forehead tabs tightly, he had known it was to prevent friction blisters.
Kynes straightened, stepped back with a puzzled expression. "You've worn a stillsuit before?" he asked.
"This is the first time."
"Then someone adjusted it for you?"
"No."
"Your desert boots are fitted slip-fashion at the ankles. Who told you to do that?"
"It . . . seemed the right way."
"That it most certainly is."
And Kynes rubbed his cheek, thinking of the legend: "He shall know your ways as though born to them ."
"We waste time," the Duke said. He gestured to the waiting 'thopter, led the way, accepting the guard's salute with a nod. He climbed in, fastened his safety harness, checked controls and instruments. The craft creaked as the others clambered aboard.
Kynes fastened his harness, focused on the padded comfort of the aircraft—soft luxury of gray-green upholstery, gleaming instruments, the sensation of filtered and washed air in his lungs as doors slammed and vent fans whirred alive.
So soft! he thought.
"All secure, Sire," Halleck said.
Leto fed power to the wings, felt them cup and dip—once, twice. They were airborne in ten meters, wings feathered tightly and afterjets thrusting them upward in a steep, hissing climb.
"Southeast over the Shield Wall," Kynes said. "That's where I told your sandmaster to concentrate his equipment."
"Right."
The Duke banked into his air cover, the other craft taking up their guard positions as they headed southeast.
"The design and manufacture of these stillsuits bespeaks a high degree of sophistication," the Duke said.
"Someday I may show you a sietch factory," Kynes said.
"I would find that interesting," the Duke said. "I note that suits are manufactured also in some of the garrison cities."
"Inferior copies," Kynes said. "Any Dune man who values his skin wears a Fremen suit."
"And it'll hold your water loss to a thimbleful a day?"
"Properly suited, your forehead cap tight, all seals in order, your major water loss is through the palms of your hands," Kynes said. "You can wear suit gloves if you're not using your hands for critical work, but most Fremen in the open desert rub their hands with juice from the leaves of the creosote bush. It inhibits perspiration."
The Duke glanced down to the left at the broken landscape of the Shield Wall—chasms of tortured rock, patches of yellow-brown crossed by black lines of fault shattering. It was as though someone had dropped this ground from space and left it where it smashed.
They crossed a shallow basin with the clear outline of gray sand spreading across it from a canyon opening to the south. The sand fingers ran out into the basin—a dry delta outlined against darker rock.
Kynes sat back, thinking about the water-fat flesh he had felt beneath the stillsuits. They wore shield belts over their robes, slow pellet stunners at the waist, coin-sized emergency transmitters on cords around their necks. Both the Duke and his son carried knives in wrist sheathes and the sheathes appeared well worn. The people struck Kynes as a strange combination of softness and armed strength. There was a poise to them totally unlike the Harkonnens.
"When you report to the Emperor on the change of government here, will you say we observed the rules?" Leto asked. He glanced at Kynes, back to their course.
"The Harkonnens left; you came," Kynes said.
"And is everything as it should be?" Leto asked.
Momentary tension showed in the tightening of a muscle along Kynes' jaw. "As Planetologist and Judge of the Change, I am a direct subject of the Imperium—my Lord."
The Duke smiled grimly. "But we both know the realities."
"I remind you that His Majesty supports my work."
"Indeed? And what is your work?"
In the brief silence, Paul thought: He's pushing this Kynes too hard . Paul glanced at Halleck, but the minstrel-warrior was staring out at the barren landscape.
Kynes spoke stiffly: "You, of course, refer to my duties as planetologist."
"Of course."
"It is mostly dry land biology and botany . . . some geological work—core drilling and testing. You never really exhaust the possibilities of an entire planet."
"Do you also investigate the spice?"
Kynes turned, and Paul noted the hard line of the man's cheek. "A curious question, my Lord."
"Bear in mind, Kynes, that this is now my fief. My methods differ from those of the Harkonnens. I don't care if you study the spice as long as I share what you discover." He glanced at the planetologist. "The Harkonnens discouraged investigation of the spice, didn't they?"
Kynes stared back without answering.
"You may speak plainly," the Duke said, "without fear for your skin."
"The Imperial Court is, indeed, a long way off," Kynes muttered. And he thought: What does this water-soft invader expect? Does he think me fool enough to enlist with him?
The Duke chuckled, keeping his attention on their course. "I detect a sour note in your voice, sir. We've waded in here with our mob of tame killers, eh? And we expect you to realize immediately that we're different from the Harkonnens?"
"I've seen the propaganda you've flooded into sietch and village," Kynes said. " 'Love the good Duke!' Your corps of—"
"Here now!" Halleck barked. He snapped his attention away from the window, leaned forward.
Paul put a hand on Halleck's arm.
"Gurney!" the Duke said. He glanced back. "This man's been long under the Harkonnens."
Halleck sat back. "Ayah."
"Your man Hawat's subtle," Kynes said, "but his object's plain enough."
"Will you open those bases to us, then?" the Duke asked.
Kynes spoke curtly: "They're His Majesty's property."
"They're not being used."
"They could be used."
"Does His Majesty concur?"
Kynes darted a hard stare at the Duke. "Arrakis could be an Eden if its rulers would look up from grubbing for spice!"