Tacked into the tradehouse (if allowed) is a message left by a surfacer. Written in common is as follows:
Denizens of the underdark,
Far above this realm, the surface grows complacent. Its people live in a land where weaklings rule; where none know true struggle or strife. How quickly they forget the might of those below. I offer an opportunity to shatter this ignorance, to break the illusion of peace. Leave sealed letter here for further information, if your interests fall within the aforementioned.
The notice is marked with a symbol of twelve outward-pointing triangles arranged in a circle.