Raven912
Оригинал говорит следующее:

They had just turned the corner when they heard quick footsteps behind them.

“Percy!” hissed Ron, pulling Harry behind a large stone griffin.

Peering around it, however, they saw not Percy but Snape. He crossed the corridor and disappeared from view.

“What’s he doing?” Harry whispered. “Why isn’t he down in the dungeons with the rest of the teachers?”

То есть остальные учителя предположительно находятся в подземельях.