SPOILERS:
Leaving the cemetery, Harry and Hermione see his old house, then encounter someone who seems to be Bathilda Bagshot. She does not speak at all until she gets Harry alone. Too late, Harry discovers that they’ve been led into a trap, and that Bathilda’s corpse is being used as a disguise for the snake, Nagini. He and Hermione manage to escape, at the cost of Harry’s wand being broken accidentally by Hermione.