Harry Potter and the Prisoner of Azkaban Pages 310-345

Chapter 16 takes place after the Quidditch victory, when final exams come around. verybody is hard at work preparing. The care of magical creatures exam is easy. Harry receives full points on the defense against the dark arts exam, which requires that he combat several of the creatures studied over the term. In Divination, Professor Trelawney asks Harry to find signs of the future inside a crystal ball. Suddenly, Professor Trelawney's voice changes, her eyes look hypnotized, and she predicts that the Dark Lord's servant will rejoin him tonight before midnight. She snaps out of the trance and has no recollection of the prediction. Harry runs out to tell Ron, but before he can say anything, Ron and Hermione tell him that Buckbeak lost the appeal and will be executed at sunset. At Hagrid's cabin, they find Hagrid shaky but not hysterical as he explains that Lucius Malfoy must have threatened the Committee for Disposal of Dangerous Creatures. Hermione discovers Scabbers inside a milk jug in Hagrid's cabin. The executioners come and they hear the axe.

In Chapter 17, As Harry, Ron, and Hermione walk sadly away from Hagrid's cabin, they have difficulties staying hidden under Harry's cloak because Scabbers will not stay still. A black dog then comes and attacks Ron. The dog takes ron away into the forest. The dog pulls Ron under the Whomping Willow. A passage is revealed to the Shrieking Shack in Hogsmeade. . In an upstairs room they find Ron, seated by Crookshanks, and guarded by Sirius Black, who the black dog has transformed into. Black disarms Harry and Hermione through the expelliarmus spell. The kids rush Black to recover their wands while they hold Black in the corner, at their mercy. Before Harry can gather his courage to kill Black, Professor Lupin bursts through the door, disarming Harry. Hermione shrieks at Lupin that he is a traitor, and that she should have exposed him as a werewolf long ago. She says that she thought of him as a werewolf from seeing his Boggart turn into the moon, and from noting that he was out sick during each month's full moon. An exasperated Lupin gives each one of them back their wands, and explains that he was examining the Marauder's Map, watching Ron, Harry and Hermione exit Hagrid's cabin. He saw the name Peter Pettigrew alongside Ron's. At that point, he realized that Peter must alive and disguised as Scabbers.