He knew she was trying to figure it out.  He’d left a few tantalizing clues, he knew, but even with her supposed brains she hadn’t managed to work it out yet.  He’d be ready for her when she did.  He could grab her now, while she was here without her near-constant escorts.  Weasley and Shacklebolt wouldn’t be able to watch her every minute, especially in those halls she knew so well.  He smirked.  It would be almost too easy.  But where was the fun in that?  Let her come to him – and he’d remind the little whore where she ought to be.