Trap Door
WINDOWLESS SPIRE

"Yellowish stains and charred patches were found on the ladder to the windowless spire, but when a reporter climbed up, opened the horizontally-sliding trap-door and shot a feeble flashlight beam into the black and strangely foetid space, he saw nothing but darkness, and a heterogeneous litter of shapeless fragments near the aperture." -- The Haunter of the Dark