"What are we going to do with them?" Ron whispered to Harry through the dark; then, even more quietly, "Kill them? They'd kill us. They had a good go just now."

Hermione shuddered and took a step backward. Harry shook his head.

"We just need to wipe their memories," said Harry. "It's better like that, it'll throw them off the scent. If we killed them it'd be obvious we were here."

"You're the boss," said Ron, sounding profoundly relieved. "But I've never down a Memory Charm."

"Nor have I," said Hermione, "but I know the theory."