Harry Potter:" He knew when I used Sectumsempra. He didn't really need Legilimency… he might even have known before then, with Slughorn talking about how brilliant I was at Potions…. shouldn't have left his old book in the bottom of that cupboard, should he?"

Hermione Granger:" I don't think he wanted to associate himself with that book. I don't think Dumbledore would have liked it very much if he'd known. And even if Snape pretended it hadn't been his, Slughorn would have recognised his writing at once."

Harry Potter:" I should have showed the book to Dumbledore. All that time he was showing me how Voldemort was evil even when he was at school, and I had proof Snape was, too"

Hermione Granger:" Evil" is a strong word."

Harry Potter:" You were the one who kept telling me the book was dangerous!"

Hermione Granger:" I'm trying to say, Harry, that you're putting too much blame on yourself. I thought the Prince seemed to have a nasty sense of humour, but I would never have guessed he was a potential killer."