Time passes, and nearly everyone signs up to go home for Christmas. Meanwhile Fred and George joke about Harry being the [heir of Slytherin] making Ginny upset. Malfoy also seems upset at all the attention the events are getting Harry.
Harry Confronts his Doubts
Harry stands in Dumbledore's office for the first time, marvelling at everything he sees. He finds the Sorting Hat and puts it on to ask whether he was meant to be in Slytherin, and it confirms he'd have done well there, making him upset. He slams it back just in time to see Fawkes, who bursts into flame on the spot.
[Dumbledore] arrives and reassures Harry that Fawkes was supposed to burst into flame. Hagrid bursts in to vouch for Harry, which [Dumbledore] says he does not need, but he does ask Harry whether he has anything he wants to say. Though much passes through his mind, he says nothing and departs.
The Polyjuice Potion Adventure
Harry and Ron successfully knock out Crabbe and Goyle and run to [Moaning Myrtle's bathroom] to finish the [Polyjuice Potion]. The trio drinks it and transforms, but Hermione tells Harry and Ron to go ahead while she stays behind.