A Secret Passage!
Message in message cylinder
I have recently learned of your activity in the area and have an offer for you. During your time in this region, if you should capture any humanoids, we are eager to buy them. We have duergar allies in Thunderspire in need of slave stock. If you are interested, send an envoy back to me. My messengers will show the way.
Chief Krand of the Bloodreavers