A Flickering Hallway                                   -      N      - 
(-------------------------------------------------)     W <---(M)---> -
                                                        -      -      -

You are walking down a rather narrow hallway.  Several sputtering gas
lamps set into the walls light the room, but something seems to be wrong -
the flames are dancing back and forth as if a strong wind was blowing
through the hallway, yet the air around you is deathly calm.  Vines
crisscross the granite stones forming the walls, forming a sinister-looking
pattern.