While Zax establishes his "watch" out in the dim passage, Leudigar takes to poking, prodding, and generally inspecting the floor and two walls of the room. After a few minutes, Zem and Akbar catch on and help out to speed the process along. Karl and Fried stand alert just in case...
"Wha's this here?" whispers Zem; the dwarf's fingers have found a crack in the wall almost impossible for eyes to see. It is hardly a string-line wide, dead straight, and vertical. Soon the dwarf traces the outline of a 3ft x 4ft block of stone that appears to be separate from the main mass of the wall. It's almost directly opposite from the portal he entered the room by.
I'm going to assume that all the other players not mentioned have returned to the kitchen area on level 1, which was deemed a good place to hole up and wait.
So we have six players present, yes?
I'm also going to assume, for expediency, that three players do the searching in one turn rather than one player doing it in three turns while everyone else waits.
The ref throws a bunch of dice behind the screen (heh), which make a suitable rattle. At least one of them is a wandering monster check.
the Elf Medium (MV 12", AC 9, HD 1, hp 1/1, AL N) great cloak, lantern
; spells: color spray; scrolls: sleep, sleep, charm person
Hirelings: Georges; torch