Harry Potter and the Methods of Rationality

Lavender raised a hand, then, and when Hermione turned to look at her, Lavender, looking puzzled, pointed straight down the corridor, gestured to herself, and then tried to sign something else that Susan didn't understand -

General Granger shook her head, and once again, this time with slower, more exaggerated movements, made the sign for Halt, I'll look ahead.

Lavender, looking even more puzzled, pointed back the way they'd come, and made a bouncing gesture with her other hand.

Now everyone else was looking even more confused than Lavender, and Susan thought with some acerbity that evidently one hour of practice done two days ago wasn't enough to remember a new set of code signals.

Hermione pointed at Lavender, then at the floor beneath Lavender's feet, the expression on her face making it very clear that the intended meaning was You. Stay. Here.

Lavender nodded.

Doom doom doom, went the words of the Chaos Legion's marching song through Susan's mind, doom doom doom doom doom doom...

Hermione reached into her robes, and drew out a little rod with a mirror on the end of it and an eyepiece. Very very softly indeed, the Ravenclaw girl crept up to the wall, right next to where the passageway opened off the corridor, and peeked just the tip of the eyepiece around the corner.

Then a little more.

Then a little more.

Then General Granger cautiously stuck her head around the side.

General Granger turned back to them, nodded, and made the hand gesture for follow me.

Susan felt a little better as she crept forward. The part of the Plan which called for them to arrive thirty minutes before the bully had, apparently, actually worked. Maybe they were only slightly doomed...?

At ten-twenty-nine, almost on the dot, the bully showed up. If anyone had been present to hear - though the corridor was apparently empty - they would have heard his shoes clicking solidly through the main corridor, entering the passageway, walking toward where the passageway turned its first corner, turning that corner, and then stopping in some surprise upon seeing that the passageway now terminated in a solid brick wall where no wall had been before.

Then the bully shrugged and turned away, as he leaned back to watch the main passage from just around the corner.

It was the castle Hogwarts, after all.

Behind the hastily Transfigured thin panels they'd assembled into the outward appearance of a brick wall, the girls waited; not speaking, not moving, hardly even breathing, but watching through the eyeholes they'd left themselves.

As Susan's gaze took in the bully, she could feel the tightening of her chest all the way into her toes. The boy looked to be in his seventh-year if not older, and his robes were trimmed in green instead of the red they'd been hoping for, and he had muscles, and after staring for a bit longer, Susan realized his stance had the balance that meant that he dueled.

Then they all heard the sound of more feet approaching from the corridor. The fourth-year Gryffindors and Slytherins had just been let out of Potions class.

The footsteps pattered past, and diminished and faded, and the bully didn't do anything. For a moment Susan felt an instant of relief -

Then another, smaller group of footsteps approached.

The bully still didn't do anything, as the footsteps went past.

That happened a few more times.

And then, as there approached the faintly audible sound of one last set of footsteps, the seven girls heard the bully's voice saying, clear and cold and quiet, "Protego".

Someone did gasp then, though fortunately very very quietly. If they couldn't get in even a single shot -

The bullies were learning already, Susan realized, she hadn't expected S.P.H.E.W. to be able to do this very often before the bullies caught on - but - Hermione had already defeated three bullies - and the school had been buzzing with speculation about Salazar Slytherin's ghost, yesterday -

He's expecting us!

Susan would have whispered to give up, to abort the plan, only there was no way to convey a message to -

"Silencio," said the bully in a soft, deliberate voice with his wand pointed toward the corridor, the blue haze of his Shielding Charm shimmering around him. "Accio victim."

When the fourth-year boy came into their field of vision he was dangling upside down as if an invisible hand were holding him high by one leg, his red-trimmed robes beginning to slide down his thighs to reveal the pants beneath. His mouth was opening and closing helpessly, no sound coming out.

"I suppose you're wondering what's going on," the seventh-year Slytherin said in a quiet, cold voice. "Don't worry. It's so simple even a Gryffindor could understand."

With that, the Slytherin's left hand formed a fist and drove hard into the Gryffindor's belly. The fourth-year boy's body jerked around frantically, but still no words left his mouth.

"You're my victim," said the older Slytherin. "I'm a bully. I'm going to beat you up. And we'll see if anyone stops