"The duffel bag in question would have to be fairly enormous," says Miles. "I don't really think you could plausibly claim that everyone just forgot they saw you bring it in. We could, I don't know, dress them both up as me and have us all leave as unobtrusively as possible by different exits. With somebody to shepherd Stalas. As long as no one actually sees all three of us in the same room, 'which way did he go and when' is the sort of thing people are pretty willing to have their memories quietly revised about. 'Was she or was she not carrying Father Frost's sack of presents when she came in a few minutes ago' is... less that way. I could easily imagine someone deciding that you were making off with the family silver or some damn thing, and demanding to see in the bag."