Harry ¡ª this is a Pocket Sneakoscope. If there's someone untrustworthy around, it's supposed to light up and spin. Bill says it's rubbish sold for wizard tourists and isn't reliable, because it kept lighting up at dinner last night. But he didn't realize Fred and George had put beetles in his soup.
¡°What, scared to hear your old master's name?¡± said Black. ¡°I don't blame you, Peter. His lot aren't very happy with you, are they?¡±