¡°But what was it?¡±
¡°Professor Lupin?¡± he said. ¡°If you knew my dad, you must've known Sirius Black as well.¡±
¡°Thank you, Dean,¡± said Professor Lupin, putting his wand away again. ¡°Shall we proceed?¡±
¡°Didn't make any difference?¡± said Dumbledore quietly, ¡°It made all the difference in the world, Harry. You helped uncover the truth. You saved an innocent man from a terrible fate.¡±
¡°Professor Severus Snape, master of this school, commands you to yield the information you conceal!¡± Snape said, hitting the map with his wand.