The Staircase descends another twenty feet before opening into a room. From this landing, you can hear strange sounds emenating from the chamber below, specifically chirping birds, rustling leaves, and cheery giggles. The landing itself is bare save for an empty iron torch sconce mounted on the south wall.
The staircase ends at a forty-foot-square room with a ten-foot-high ceiling. A slight draft blows into the room from a ten-foot-wide open passage in the far wall, directly across from the stairs. Two four-foot-diameter circular doors are set into the middle of the south wall. Each door is made of wood and framed with a ring of mortared stones. The westernmost door is closed and inscribed with a strange Gnomish glyph. The easternmost door bears a different glyph but rests half-open. The half-open door reveals an iron rim of gearlike teeth, and dim light spills from the chamber beyond. Mounted to the walls of the room are twelve tarnished copper masks. The masks are two feet tall and cling four feet above the floor. Each one depicts a smiling gnome's visage. The soft giggling, chirping, and rustling noises seem to pour from the very walls.
Of the pics attached, rune1 is on the west door and rune3 is on the east door, which is half open