The wounded sand-prince and his trusty horse are simply brilliant! And yes, that keyhole was pretty well hidden, oops. Yay horsie!
I don't think I made it too clear, but Dorian's wearing a British soldier's uniform without the jacket. He's in a long wooden hallway with more hallways branching off it, lit up by yellow glowing vines that line the ceiling. It's the interior of a massive seafaring ship.
I'm not sure if you read the previous version, but I changed the hallway from stone to wood because it makes more sense. xD