Many thanks to Monty Twain for giving me this idea!
The first time Mrs. Hudson heard the scraping sounds from above, she had bounded upstairs, fearful of finding him experimenting on the new paint she had used on the walls.
On arrival, she had found the room completely intact (as much as it was possible for it to be in the presence of Sherlock Holmes) and his tall form standing near the window holding a violin, running the bow over it like a lover. Next minute beautiful music floated out, and she left grateful for the little peek she had in his life.
Nearly two years later, she returned to the room, only to find the doctor standing there, the Stradivarius in his grip and soft tears in his face.
Mrs. Hudson could have sworn to have heard violin music moments back.
This is a pretty much random drabble. Try to find some sense in it, will you?