Harry Tells Hermione About Snape and Malfoy
Pages 352-353
Harry recounts his eavesdropping on Snape and Malfoy at Slughorn's Christmas party, revealing that Snape has promised to help Malfoy and even made an Unbreakable Vow. Hermione, however, is skeptical, suggesting that Snape could have been pretending to trick Malfoy into revealing his plans.
