Across the Great Foreboding Underdark!
Simeon continues to lead you to the east. There are no side passages here, and, in fact, there hasn't been another passage to take since the chamber with the dark lake, but it led to the west. After about ten more miles, you see a very small, treacherous-looking, rubble-strewn passage branching off to the south. Simeon pays this no heed and continues on to the east. After about 5 more miles, Simeon slows and stops, crouching and listening carefully. All that you hear is the sound of water dripping somewhere. After a long moment, Simeon rises and motions you forward. About 100 feet later, you come to another intersection. Here the primary passage that you are currently following continues on to the east, and another broad, primary passage branches off to the north. Simeon indicates that north is the proper way. Simeon huddles up with all of the wizards and whispers, "Be very quiet now. We are very dangerously close to the Crushed Skull Tribe's territory. Hopefully, we will be able to slip through here undetected."
[Everyone give me three Move Silently checks, please?]