The door opened after a few moments. Sherlock was looking slightly upwards, expecting Amyus Crowe to be standing inside the doorway, and for a moment he was confused by the empty space. His gaze droped, and he felt his heart stutter as it came to rest on the face of a girl at the same level as his own. Her cloths were dark, and in the shadows of the hall her face seemed to be floating in mid-air.