Ron Reveals That the Dog is an Animagus

PAGES: 338-339

Harry and Hermione find Ron in the Shrieking Shack with his leg badly broken. Ron frantically warns them that the black dog is not just a dog but an Animagus—Sirius Black in disguise. Before they can react, Sirius Black appears from the shadows, disarming them with Ron's wand and trapping them inside the room.