He thought for a moment of telling Lupin about the dog he'd seen in Magnolia Crescent but decided not to. He didn't want Lupin to think he was a coward, especially since Lupin already seemed to think he couldn't cope with a Boggart.
¡°Naturally,¡± said Professor McGonagall. ¡°James Potter told Dumbledore that Black would die rather than tell where they were, that Black was planning to go into hiding himself¡and yet, Dumbledore remained worried. I remember him offering to be the Potters¡¯ Secret-Keeper himself.¡±
Flushed with his success, Harry hung around to watch Ron and Hermione. Ron did very well until he reached the Hinkypunk, which successfully confused him into sinking waist-high into the quagmire. Hermione did everything perfectly until she reached the trunk with the Boggart in it. After about a minute inside it, she burst out again, screaming.
There was a knock on the door. Harry hastily stuffed the Marauder's Map and the Invisibility Cloak into his pocket.