Bruce Bushman started his career at Disney in the animation department, as an art director and layout artist in the 1940s. By the mid 1950s he'd moved over to the WED division where he helped design this new concept Walt had called Disneyland.
This begins a series of concept pieces for the original Alice in Wonderland walkthrough attraction that was never built. These pieces are called brownlines, and not original drawings but blue-print-like copies, but brown (hence the name). I am missing a few, but you'll get the basic idea of what the attraction was supposed to be like. I also apologize in advance for some of these images, these are quite large (24x19) so I had to take photos rather than scan, so there is some glare on a few.
First up is the Forced Perspective Room. This would be just after Alice has landed at the bottom of the rabbit hole.
Notice the key on the top of the table. The text reads: "3 Forced perspective room concealed exit at far end other door to no where".