Since the flooring I cut for the study had a few minor gaps around the edges and some piecing by the fireplace, I brushed on a little brown paint so the subfloor wouldn't be so obvious.

I drilled holes in the chimney breast for the sconces and then glued the assembly to the wall.  I used Yes! paste to attach the wallpaper (scrapbook paper by The Paper Company called Parchment Tan).  There are three separate pieces.  The first one I glued in place was on the angled wall with the window.  I cut it with roughly 1/4" edges on either side to go under the other two pieces to prevent gaps along the seams.

click image to enlarge

Once the wallpaper was done, I ran the wires for the sconces through the chimney breast.  I plan to pull the wires up through the ceiling and run them along the floor of the second story to the power strip.

I think I am getting the hang of electrification!  :D

Close-up of the lights...