"Maybe it's a spirit," Harry says. "A spirit shaped like a pine weasel. Or the spirit of a pine weasel. Maybe we should follow it."

"Yes!" Ben says, beginning to do just that. "Either it'll lead us out, or further in, and after everything I did for these little bastards it better not be further in." He wags a finger after the tail of the pine weasel, which is snaking away between two curtains.