Sirius Warns Harry About Crouch and Snape
Pages 529-534
Sirius shares his suspicions about Barty Crouch and Severus Snape, warning Harry to stay cautious. Despite Hermione's insistence that Dumbledore trusts Snape, Sirius remains skeptical. He also urges the trio to keep him updated about anything suspicious and to continue using the codename "Snuffles."