There's a muffled "Just a moment-" as footsteps move down the stairs - two sets, in fact, and the lighter pair stops short as the heavier set continues, and Arthur opens the door. Behind him, a blond-haired teenager is poking his head into the corridor to see as well, but Arthur doesn't seem to pay him any mind.

"Can I help you?" It's polite, stiff and formal; he's clearly distracted, since he's got his jacket off and shirt sleeves rolled up.