Harry Potter and the Methods of Rationality

Millicent swung out her legs from the table and stood up, slinging her bookbag over one shoulder, then looked over at where Daphne was approaching, the girl's expression puzzled.

"Hey, Millicent," Daphne said as she drew near, making her voice low and excited, "guess what I figured out today?"

"The thing about Salazar Slytherin's ghost helping Granger?" said Millicent. "I already heard about that -"

"No," Daphne said in a hushed whisper, "this is even better."

"Really?" Millicent said, in an equally low excited voice. "What is it?"

Daphne looked around conspiratorially. "Come to my room and I'll tell you."

They went off toward the stairs that led downward, the private rooms were even lower in the lake than the seventh-year dorms...

Soon enough Daphne was sitting in her comfy desk-chair and Millicent had bounced over to the edge of her bed.

"Quietus," said Daphne, when they were both seated; and then instead of putting her wand away inside her robes, Daphne just let her hand fall naturally down to her side, still holding the wand, just in case.

"All right!" said Millicent. "What is it?"

"You know what I figured out?" said Daphne. "I figured out that you get the gossip so fast, you know about things before they actually happen."

Daphne had half-expected Millicent to turn white and fall over, and she didn't really, but the girl did flinch pretty hard before she started stammering denials.

"Don't worry," said Daphne with her sweetest smile, "I won't tell anyone else you're a seer. I mean, we're friends, right?"

Rianne Felthorne, seventh-year of Slytherin, was working diligently on yet another two-foot essay (she was taking everything except Divination and Muggle Studies and her N.E.W.T. year seemed to consist entirely of homework) when her Head of House strode up to the table she was working at and barked "You will come with me, Miss Felthorne!" and walked away even as she frantically began putting away her parchment and book and quill.

When she caught up with Professor Snape, he was waiting just outside the room and gazing at her with half-lidded eyes that seemed far too intense; and before she could ask what this was about he spun without a word and stalked off through the hallways, so that she had to scramble to keep up.

Their walk took them down a flight of stairs, and then another, below what she'd thought was the lowest level of the Slytherin dungeons. And the corridors began to look older in their appearance, the architecture reverting back in time by centuries into roughened stone held together by crude-looking mortar. She began to wonder if Professor Snape was taking her to the real dungeons that she'd heard rumors of, the true dungeons of Hogwarts that had been sealed off to all but faculty; and if maybe Professor Snape did terrible things down there to innocent helpless young girls but that was probably just wishful thinking on her part.

They went down another flight of stairs, and came out into a room that was no room at all, but an empty rock cavern with a single door, pierced by many dark openings and lit by a single torch of ancient style that fired as they entered.

Professor Snape took out his wand, then, and began to cast Charm after Charm, she lost track of how many; and when the Potions Master was done he turned back toward her, locked his intense eyes on hers, and said in a level voice unlike his usual drawl, "You will say nothing to anyone of this matter, Miss Felthorne, nothing now or ever. If that is acceptable to you, nod. If not, we will turn and go."

She nodded, frightened and with a strange hope dawning in her heart (well, not exactly her heart).

"The task I have for you is very simple, Miss Felthorne," said Professor Snape's toneless voice, "and your extremely generous pay of fifty Galleons is merely to compensate you for being Memory-Charmed afterward."

She drew an involuntary breath. Her family might be rich but they had other daughters and kept her on a tight leash and it was certainly a lot of money for her.

Then her ears caught up with the words Memory-Charmed and for a moment she felt outraged, there was no point if she couldn't keep the memories, what sort of girl did Professor Snape think she was?

"You surely know," said Severus Snape, "of Miss Hermione Granger, the Sunshine General?"

"What?" said Rianne Felthorne in sudden horror and disgust. "She's in her first year! Ew!"

Chapter 72: SA, Plausible Deniability, Pt 7