342
As you inch your way towards the iron portal, your super-senses alert you to a hairline crack which runs vertically through the cavern wall. You run your fingers along the seam and your fingertips detect a faint change in air pressure. At once you realize that you have stumbled upon a secret doorway.
Eagerly your eyes search the adjoining wall and floor for a concealed latch or lever. It takes a few minutes, but eventually you detect what you are looking for: a hinged flap of stone covers a lever which is set nearby into the wall at knee-height from the floor.
If you wish to pull this concealed lever, turn to 115.
If you decide to ignore it, turn to 127.