[He scoffs at her question, honestly surprised by her gall.]

Matters which d-d-don't concern you. If you absolutely must know, a number of components for my research centered on him. Your apprehension of the d-d-d-d-d-d...demon was t-t-t-tantamount to the completion of my investigations.

[There is a pause, he considers speaking further but pushes the matter aside.]

All that is required of you is to keep me informed.