"And you've decided to act like an impertinent child while you can still get away with it. I see." It annoyed him that detention was such an empty threat, these days. His arsenal was getting poorer and poorer.
"It was the best thing to do - if there's anything you can do for them that they could do themselves with only marginally more difficulty, you shouldn't hesitate. Whatever comes of it, your cover is worth more." He began running through the list of pureblood boys in their seventh year, picking off some likely candidates. "Have you spoken to any of them? How many seem willing?"