Looking forward to your work, Richard. Sorry that we can't get any closer to the actual design, too many variations in the illustrations and not enough background in the frame in the photos. Still worth the endeavor!
I don't know about the door being where the window is. I can't tell if the yard slopes underneath the window, or if it is just an optical illusion in the photo. If it slopes, it would seems a bad place for a door.
I'm rethinking whether or not Mary's door was part of the original design. Going over the photo with a mikerscope to see if i can see cutwork in the bricks around the door (if, in fact, it was added later). One thing I noticed in all of illustrations is the depiction of a "fanwork" (or arch) of bricks over No. 13's door. I can almost see them in the photo. Now I can't say that this arch of bricks wasnt added along with the door if it was installed at a later date, but that seems like an elaboration on the work needed just to add a door. Also, I'm trying to determine if her doorstep could have been created by cutting out a doorframe in the brick. To me, currently, it looks like the bricks are built around the doorstep, making me condider that the No 13 door may have been part of the original design.
there,s nothing new, only the unexplored