Harry glanced at Hermione, who looked very frightened but nodded.
Lupin's face had hardened, and there was self-disgust in his voice. ¡°All this year, I have been battling with myself, wondering whether I should tell Dumbledore that Sirius was an Animagus. But I didn't do it. Why? Because I was too cowardly. It would have meant admitting that I'd betrayed his trust while I was at school, admitting that I'd led others along with me¡and Dumbledore's trust has meant everything to me. He let me into Hogwarts as a boy, and he gave me a job when I have been shunned all my adult life, unable to find paid work because of what I am. And so I convinced myself that Sirius was getting into the school using dark arts he learned from Voldemort, that being an Animagus had nothing to do with it¡so, in a way, Snape's been right about me all along.¡±
¡°Professor Snape has very kindly concocted a potion for me,¡± he said. ¡°I have never been much of a potion-brewer and this one is particularly complex.¡± He picked up the goblet and sniffed it. ¡°Pity sugar makes it useless,¡± he added, taking a sip and shuddering.
¡°You know how many subjects I'm taking,¡± said Hermione breathlessly. ¡°Couldn't hold these for me, could you?¡±
¡°Ah, starting Divination, are you?¡± said the manager, stripping off his gloves and leading Harry into the back of the shop, where there was a corner devoted to fortune-telling. A small table was stacked with volumes such as Predicting the Unpredictable: Insulate Yourself Against Shocks and Broken Balls: When Fortunes Turn Foul.