Sirius Black Breaks Into the Gryffindor Dormitory

Late that night, Ron wakes up in a panic, claiming that Sirius Black broke into their dormitory and slashed his curtains with a knife. The Gryffindor students rush downstairs, and Professor McGonagall arrives to investigate. Sir Cadogan reveals that Sirius Black had the passwords, which had been written down and left by Neville Longbottom.