So late to the party
Nobody's ever tipped Mark off about the mirrors, so he has no idea why the mansion's orientation has suddenly changed. The damage (there's suddenly so much more of it) he attributes to the creature--he doesn't like to think of it as the Jabberwocky, still doesn't like to dwell too much on the nature of Wonderland--or to the venting of the mansion's residents. Either way, it doesn't make navigating any easier. So now he's wandering the halls, searching for familiar landmarks and muttering to himself as he goes. Because that's not crazy at all.
"Pocket dimension. It doesn't have to make sense, it's a pocket dimension..."
"Pocket dimension. It doesn't have to make sense, it's a pocket dimension..."