"Bill is clever enough to know how I'd react once I learned of their treachery, even if Arthur isn't. But both of them will be well aware that it is only because I wanted to to retain my anonymity that I haven't gone for them before now. I imagine that if they were sat in the kitchen at The Burrow right now they'd be sweating in their nervousness, watching that old clock of theirs as the hands bearing their names quivered as they pointed at In Mortal Peril."