Percy Enforces Order While Students Speculate About Sirius Black
Pages 163-164
As students settle down for the night in the Great Hall, Percy Weasley attempts to maintain order, while Harry Potter, Ron Weasley, and Hermione Granger discuss how Sirius Black managed to break into the castle. Hermione theorizes, based on her knowledge of Hogwarts' defenses, that it would be impossible for Black to Apparate, fly, or sneak past the dementors without detection.
