"It's just as I thought. Everything Trevor writes to me has a hidden meaning! When he says there's someone bothering him, he means the Sparrowhawk!" Rose glanced at the chilling murderer - who didn't move a muscle to confirm her theories - and turned back to Draco. "He isn't answering, so maybe it's true! The Sparrowhawk is at Hogwarts! We never thought of that... and what if he's not even a student, but a teacher? Trevor never specified the role of the person who's annoying him!"