While prepping to paint, I unscrewed the thermostat found near the upstairs landing. Behind it is not one but two layers of wallpaper. Surprisingly, the floral with the dark background is remarkably similar to the wallpapers we have been looking at for the downstairs half-bath.
Update: I found the same wallpaper behind the downstairs thermostat. I wish there were photos of the house from that time period. I’d love to know what the interior used to look like.