A Small Underground Bog                                -      -      - 
(-------------------------------------------------)     - <---(M)---> E
                                                        SW     -      -

You step through the collapsed wall of the catacombs and drop down into a
bog.  The area is much brighter than in the catacombs.  At first you can not
figure out where the light is emanating from, but soon you catch sight of a
floating sphere of light, it seems to be beckoning you to the east.  You
suddenly recognize what this sphere of light is, it is a will o'wisp, known
for luring adventurers to their untimely deaths in swamps.  It could be very
dangerous heading to the east.