Cursing, clocking that the doors Adelaide had managed to escape through were closing behind her, he dove for them, sliding through just before they slammed closed. He sprang to his feet and took off after Adelaide, who was streaking down the stairs directly in front of him. As she turned on the landing of the third floor, aiming for the staircase down to the second, Draco caught sight of the ruby strapped across her chest and felt a particularly powerful surge of... magic. Power. The ruby. That was... that was Hermione's magic. That gem was holding Hermione's magic. Draco shot to his feet, sprinting after Adelaide as she careened down the next flight of stairs. He caught the flash of the woman's hair again as he hit the second floor, and was pounding down the stairs to the first floor foyer when he was knocked off his feet by a hex from above and behind him. A stinging jinx, a mild one from the feel of it. Even so, the interruption of his momentum caused him to stumble, striking his head against the bannister of the staircase.