[@BKburke]

[i]The ceiling of the tunnel is made of the same twigs and sticks that were seen on the floor of the chamber.  There is a layer of dust on the floor that gets heavier the further the construct goes, but also obvious tracks through the dust, as if someone crawled out of the tunnel earlier.  After turning to the right, the tunnel continues straight for 30' before turning right again (north).  Immediately after that turn, there is an opening in the ceiling of the crawlspace leading upwards.  Straight ahead, the tunnel is blocked by a recent cave-in.[/i]  

[IMG]http://i63.tinypic.com/28ba2pu.jpg[/IMG]