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

There he goes again , Feyd-Rautha thought. It sounds like he's being insulting, but there's nothing you can call out for satisfaction .
Listening to the man gave Feyd-Rautha the feeling his head was being pushed through mush . . . um-m-m-ah-h-h-hm-m-m-m! Feyd-Rautha turned his attention back to the Lady Fenring.
"We're ah-h-h taking up too much of this young man's time," she said. "I understand he's to appear in the arena today."
By the houris of the Imperial hareem, she's a lovely one! Feyd-Rautha thought. He said: "I shall make a kill for you this day, my Lady. I shall make the dedication in the arena, with your permission."
She returned his stare serenely, but her voice carried whiplash as she said: "You do not have my permission."
"Feyd!" the Baron said. And he thought: That imp! Does he want this deadly Count to call him out?
But the Count only smiled and said: "Hm-m-m-m-um-m-m."
"You really must be getting ready for the arena, Feyd," the Baron said. "You must be rested and not take any foolish risks."
Feyd-Rautha bowed, his face dark with resentment. "I'm sure everything will be as you wish, Uncle." He nodded to Count Fenring. "Sir." To the lady: "My Lady." And he turned, strode out of the hall, barely glancing at the knot of Families Minor near the double doors.
"He's so young," the Baron sighed.
"Um-m-m-m-ah indeed hmmm," the Count said.
And the Lady Fenring thought: Can that be the young man the Reverend Mother meant? Is that a bloodline we must preserve?
"We've more than an hour before going to the arena," the Baron said. "Perhaps we could have our little talk now, Count Fenring." He tipped his gross head to the right. "There's a considerable amount of progress to be discussed."
And the Baron thought; Let us see now how the Emperors errand boy gets across whatever message he carries without ever being so crass as to speak it right out .
The Count spoke to his lady: "Um-m-m-m-ah-h-h-hm-m-m, you mm-m will ah-h-h excuse us, my dear?"
"Each day, some time each hour, brings change," she said. "Mm-m-m-m." And she smiled sweetly at the Baron before turning away. Her long skirts swished and she walked with a straight-backed regal stride toward the double doors at the end of the hall.
The Baron noted how all conversation among the Houses Minor there stopped at her approach, how the eyes followed her. Bene Gesserit! the Baron thought. The universe would be better rid of them all!
"There's a cone of silence between two of the pillars over here on our left," the Baron said. "We can talk there without fear of being overheard." He led the way with his waddling gait into the sound-deadening field, feeling the noises of the keep become dull and distant.
The Count moved up beside the Baron, and they turned, facing the wall so their lips could not be read.
"We're not satisfied with the way you ordered the Sardaukar off Arrakis," the Count said.
Straight talk! the Baron thought.
"The Sardaukar could not stay longer without risking that others would find out how the Emperor helped me," the Baron said.
"But your nephew Rabban does not appear to be pressing strongly enough toward a solution of the Fremen problem."
"What does the Emperor wish?" the Baron asked. "There cannot be more than a handful of Fremen left on Arrakis. The southern desert is uninhabitable. The northern desert is swept regularly by our patrols."
"Who says the southern desert is uninhabitable?"
"Your own planetologist said it, my dear Count."
"But Doctor Kynes is dead."
"Ah, yes . . . unfortunate, that."
"We've word from an overflight across the southern reaches," the Count said. "There's evidence of plant life."
"Has the Guild then agreed to a watch from space?"
"You know better than that, Baron. The Emperor cannot legally post a watch on Arrakis."
"And I cannot afford it," the Baron said. "Who made this overflight?"
"A . . . smuggler."
"Someone has lied to you, Count," the Baron said. "Smugglers cannot navigate the southern reaches any better than can Rabban's men. Storms, sand-static, and all that, you know. Navigation markers are knocked out faster than they can be installed."
"We'll discuss various types of static another time," the Count said.