Ron's Development and Harry's Suspicion of Draco Malfoy
Pages 234-236
After being left out of Slughorn's party, Ron grows more jealous. Meanwhile, Harry continues to speculate about Draco Malfoy's involvement with Dark objects, convinced that Draco brought something dangerous to Hogwarts. Hermione points out that Malfoy couldn't have brought anything into the castle because of the Secrecy Sensors.
