[Gregor tilts his head, watching Mark's face with a careful, coiled intensity, sharpening briefly before it eases again. He looks utterly relaxed despite the half-implied threat, his eyebrows climbing briefly.]

Yes, I know. After you took Miles' place and dispatched Aral, I expect, though the precise timetable wasn't necessarily clear. It matters less now, I suppose. [He flips a hand palm-out in agreement, lifting his chin.] And... you're quite right. I don't have a clue who you are. Thing is, I'm not entirely sure you do, either, since it doesn't seem like anybody has given you the opportunity to figure it out without having your elbow jogged.