Chapter 19

In her chambers, Alia tells Duncan Idaho that abducting Jessica and blaming House Corrino is necessary to preserve the Atreides Empire for Paul’s children. Duncan, wary of Alia’s changed nature, deflects with talk of Arrakeen’s false “arts” and notes Leto’s desert journey with Stilgar, hinting at growing discontent and faith in Muad’Dib among Fremen.

Probing Stilgar’s motives, Duncan judges the Naib constrained by duty, then weighs Alia’s demand. He senses her cruelty and the danger behind framing Corrino. Determined to act but not as ordered, he withholds details and observes Alia’s unsettling detachment, which triggers his mentat trance.

In frozen analysis, Duncan concludes Alia is fully possessed by another ancestral persona—Abomination—and seeks Jessica’s removal to silence Bene Gesserit scrutiny. He calculates that Corrino will avoid atomics and that Alia’s terror tactics spring from her alien control, not strategic necessity.

Challenging her, Duncan asks if she prefers Jessica dead and perceives her momentary joy. Alia then justifies herself, revealing she uses Bene Gesserit enzyme control to prolong youth, a secret that, if exposed, would make the Sisterhood align with Corrino and imperil all Reverend Mothers. She claims Jessica’s reports have already turned the Sisterhood against her.

Alia cites Farad’n’s perilous gifts and Tyekanik’s expertise in poisons, and dismisses Gurney as absent on a desert errand. Duncan masks his intent, tells Alia she should not know the abduction details, and departs. Internally, he resolves to protect Jessica and thwart Alia’s plan, leaving in sorrow.