A Split in the Trail                                   NW     -     NE 
(-------------------------------------------------)     - <---(M)---> -
                                                        -      -     SE

Here, the collapsing passage splits in two different directions.  To the
northeast, a hole has opened up in the side of the stone wall and the
earthen wall behind it has given away.  Shining your light source into it,
growing all around and inside the water.  Also, a light seems to be
emanating somewhere further inside the bog.  Continuing along the trail to
the southeast, is more of the crumbling hallway.  
A writhing mass of snakes covers the floor here.
A thorny, red-veined vine twines its way around your feet.
A writhing mass of snakes begins attacking you!
A writhing mass of snakes has several minor wounds and bruises.