The Way Is Shut
After securing the bodies, the party continues to explore the underground Moathouse complex.
The party enters the room where Kerwyn, Toriah, and Raner saw the cultist and gnolls and skeletons.
The bones of the Ogre Skeleton still litter the floor. The cultists and gnolls are nowhere in sight. Another stairwell leads upstairs to the moathouse above (this stairwell is even smaller and there is no chance the Dragon could fit down this stairwell).
A Heavy Oak door lies to the south. Searching the south east corner of this room, you find the secret passage that Spugnoir mentions leads to another complex.
Before entering the secret passage, the party explores the room beyond the heavy oak door. Little other than dust and cobwebs remains in this room. The North wall bears a scrawled carving in Common, "Death to all ogres."
Entering the secret passage, you travel down a flight of stairs and turn to the right. After traveling 60 feet, you encounter an iron portcullis which blocks further progress down the corridor. The iron bars are two inches thick. It looks like it weighs 1000 lbs.
From your study of the portcullis, it looks like there is probably a mechanism to lift the portcullis through pulleys and a winch, on the other side of the portcullis somewhere out of sight. It looks like the corridor enters a T intersection twenty feet on the other side of the portcullis.