You follow a circular tunnel for several minutes until you come to a flight of steps leading down. Here, a few paces before the steps begin, you see a plain wooden door which is set into the tunnel wall. An inquisitive prod with the toe of your boot reveals it to be unlocked.
If you wish to investigate what lies behind the door, turn to 239.
If you choose to ignore the door and descend the steps instead, turn to 347.