Poto goes to the western alcove and discovers it continues as a corridor continuing west into inky darkness, you think for about 40' and 't's, and perhaps...a door?
Griswald tugs at the door. seems secure, as long as the stone holding it in place isn't removed. Peering into the 20x30 ft room, you see cots and chests,perhaps a dozen each. something burning in the center of the room is giving off a feint golden light that casts many shadows, though, from outside the room, its difficult to see any details.