As I promised previously, I’ve now added floor plans for the Residence second floor around 1863 and around 1880. However, comparing them side by side suggests that the 1863 diagram (a modern drawing from Seale’s 2-volume The White House) has the old west stair wrong. It looks like the artist drew in the original west stair to me.
Also, I improved the 1901 second floor plan and added it to the second floor page. And I added all the floor plans to the appropriate renovation pages.