Oxford Tour Monk

last night I dreamed on a tour of the Oxford university, I was walking along with a guide, she was telling me about the school origins, when we reached a central grounds sorrounded by dorm rooms which were originally occupied by monks, she told me one particular dorm room was sealed off using the same material the building was built on, so from the inside you could never tell a room was there, but if you look from the outside you can see the window, so she showed me the window, and just then some light turned on inside the room, I asked if I could have a closer look, she said I would need to climb up there, that would be the only way to look inside, so i climbed as high as I could to have a peek and saw a spirit there that looked half way between a monk and a Freddy Krueger, from nightmare on elm stree...