"Hogwarts!" she commanded, and their faces vanished from view, replaced by Snape’s office.  He hadn’t chosen to use Dumbledore’s office in the west tower, preferring the familiarity of his own office in the dungeons.  It was separate from the Potions classroom that was now Slughorn’s.  He looked up as she stepped out of the fireplace, arching his eyebrow as his gaze traveled over her muggle clothing.  It was clean but after everything they’d been through on the run it was still stained with dirt and grass.