Hermione Suspects Umbridge Is Reading Harry's Mail
Pages 374-375
Hermione Granger shares her suspicion that Dolores Umbridge has been reading Harry Potter's mail. She believes this is why Hedwig was attacked and why Filch falsely accused Harry of ordering Dungbombs. The conversation takes place during Charms class, where the trio is practicing Silencing Charms on frogs and ravens.
