Empty
He'd been walking about the castle aimlessly for hours before he'd finally found himself outside the Physician's quarters. He stood there, glaring at the door for what must have been ten minutes or more before he finally brought himself to knock. There was no answer which probably meant Gaius was out on his rounds. He stood there dithering, staring at the door for a few more moments before finally pushing it open.
Arthur glanced about, noting that it was tidier now than in recent years. A lump formed in the back of his throat as he realised why. The room was just as cluttered as usual, Gaius' instruments, vials and books strewn about the place but all of Merlin's things were gone.
Reluctantly he moved through the clutter, slowly making his way towards the back room –Merlin's room. He wasn't surprised to find the room completely bare, a layer of dust beginning to form on top of everything. He felt just as empty inside at the sight.