Human: Produce a detailed written description of a magical hallway in a mansion with a runner, wall, stone fragments, and sandstone. Assistant: 
Several stone fragments clutter the interior of an arched niche in the western wall, the sole remains of what appears to have been a painted tablet. The abrupt length of hallway is otherwised untouched, from its walls of brass-adorned sandstone down to the runner of emerald velvet that proceeds in a sinuous fashion along the floor, inexorably curving upward to the tower's zenith.