Human: Make a concise location description of a spooky hallway with a guttering lantern, musty odor, boards, and a curtained opening. Assistant: 
A guttering lantern provides enough light to avoid tripping on the uneven flooring, but the musty odor of mildew and the black-stained boards of the walls give the hallway a close, malevolent feel. A curtained opening is visible in the west wall.