Harry Potter and the Methods of Rationality

themselves. What force could have moved them, or willed their motion?" The icy blue glitter of the Defense Professor's eyes met Harry's own gaze. "Some hand possessed of influence within Slytherin, perhaps. Then how would that hand have benefited itself by harm done to the girl and her followers?"

"Um..." said Harry. "It would have to be someone threatened by Hermione somehow, or someone who would get the credit if she was hurt? I don't know anyone who fits that profile, but then I don't know much about anyone in Slytherin outside first-year." The thought was also coming to Harry that deducing a hidden mastermind from a single mildly-unexpected attack seemed like insufficient evidence to support the prior improbability of the theory; but then it was Professor Quirrell who was doing the deducing...

The Defense Professor was just looking at Harry, eyelids slightly lowered as though in impatience.

"And yes," said Harry, "I am sure that Draco Malfoy isn't behind it."

A hiss of outward air like a sigh. "He is the son of Lucius Malfoy, trained to the most exacting standards. Whatever you have seen of him, even in what seem to be unguarded moments when his mask slips and you trust that you have seen the truth beneath, even that may all be part of the face he chooses to show you."

Only if Draco successfully cast the Patronus Charm as part of keeping up the act. But Harry didn't say that, of course; instead he just grinned slightly, and said, "So either you've really never read Draco's mind, or that's just what you want me to think."

There was a pause. One of the hands turned over, beckoned a finger.

Harry stepped into the room. The door closed behind him.

"That was not something you should have said aloud in human speech," said Professor Quirrell's soft voice. "Legilimency, on Malfoy's heir? Did Lucius Malfoy learn of it, he would have me assassinated outright."

"He would try," Harry said. It should have won a crinkle of Professor Quirrell's eyes, but the Defense Professor's face was unmoving. "But sorry."

When the Defense Professor spoke again, his voice had once more become a cold whisper. "I suppose I could, and pity the assassin." His head fell back against the chair, lolled to one side, the eyes no longer meeting Harry's. "But these small games hardly hold my interest as they stand. Add Legilimency, and it ceases to be a game at all."

Harry hardly knew what to say. He'd seen Professor Quirrell in an angry mood once or twice before, but this seemed emptier, and Harry didn't know what to say to it. What's bothering you, Professor Quirrell? he could not ask.

"What does hold your interest?" Harry said a few moments later, after he'd worked it out as a safer-seeming strategy for redirecting Professor Quirrell's attention to positive things. Citing experimental results about keeping a gratitude journal as a strategy for improving life happiness didn't seem like it would be taken well.

"I will tell you what does not hold my interest," said that icy whisper. "Grading Ministry-mandated essays does not hold my interest, Mr. Potter. But I have undertaken the position of Defense Professor at Hogwarts, and I will see it through to its end." Another parchment appeared in front of Professor Quirrell's head, and his eyes began to scan it. "Reese Belka held a high position in my armies before her folly. I will offer her the chance to stay rather than being expelled, if she tells me exactly of the forces which moved her. And I shall make clear to her what will happen if she lies. I do permit myself to read faces."

The Defense Professor's finger pointed past Harry, toward the door.

"But whether you were wrong about human nature," Harry said, "or whether there's some extra force at work in Slytherin House - either way, Hermione Granger is in more danger than you predicted. Last time it was three strong fighters, so what happens after -"

"She wishes not my help, nor yours," said a soft cold voice. "I no longer find your concerns so entertaining as I once did, Mr. Potter. Go."

Somehow, even though they were all equals and she definitely wasn't in charge, it was always Hermione who ended up speaking first in this sort of situation.

The four tables of Hogwarts, the four Houses having breakfast, were glancing over at where they, the eight members of S.P.H.E.W., had gathered off to one side.

Professor Flitwick was also staring sternly at all of them from the Head Table. Hermione wasn't looking there, but she could feel Professor Flitwick's gaze on the back of her neck. Literally feel it. It was really creepy.

"Why'd you tell Tracey you wanted to talk to us, Mr. Potter?" said Hermione, her tone crisp.

"Professor Quirrell expelled Reese Belka from her army last night," Harry Potter said. "And from all her other after-school Defense activities. Do any of you see the significance of that? Miss Greengrass? Padma?"

Harry's eyes swept over them, as Hermione exchanged a puzzled glance with Padma, and Daphne shook her head.

"Well," Harry said quietly, "I wouldn't actually expect you to. But what it means is that you're in danger, and I don't know how much danger." The boy squared his shoulders, looking straight into Hermione's eyes. "I wasn't going to say this, but... I just wanted to offer to put you under whatever protection I could give. Make it clear to everyone that anyone who messes with you, is messing with the Boy-Who-Lived."

"Harry!" said Hermione sharply. "You know I don't want -"

"Some of them are my friends too, Hermione." Harry didn't take his eyes from hers. "And it's their decision, not yours. Padma? You told me that I owed you no debt for what I did, and that's the sort of thing a friend would say."

Hermione broke her gaze from Harry, to look at where Padma was shaking her head.

"Lavender?" Harry said. "You fought well in my army, and I'll fight for you if you wish it."

"Thank you, General!" Lavender said crisply. "I mean Mr. Potter. No, though. I'm a heroine and a Gryffindor, and I can fight for myself."

There was a pause.

"Parvati?" Harry said. "Susan? Hannah? Daphne? I don't know any of you so well, but it's something I would