One by one, the pairs of feet in front of Harry took the weight of their owners once more; hems of cloaks swung into sight, and Madam Rosmerta's glittering heels disappeared behind the bar. The door of the Three Broomsticks opened again, there was another flurry of snow, and the teachers had disappeared.
¡°He can't be getting in through a passage,¡± said Harry quickly. ¡°There are seven secret tunnels on the map, right? Fred and George reckon Filch already knows about four of them. And of the other three ¡ª one of them's caved in, so no one can get through it. One of them's got the Whomping Willow planted over the entrance, so you can't get out of it. And the one I just came through ¡ª well ¡ª it's really hard to see the entrance to it down in the cellar ¡ª so unless he knew it was there ¡ª¡±