Raegar sent a team of prospectors into Dun Argol to search for artifacts and information about the history of the settlement. Raegar's team never expected Dun Argol to be this heavily populated.
They're being held captive while the iron dwarves prepare for war. We haven't the men to charge in after them, and Raegar's too busy fantasizing about defeating the irons to be of much help.
It falls to you, <name>. Any of the irons or their servants could be carrying the keys to the cages holding our men.
Rewards
You will receive: 5 90
Progress
Did you locate the missing prospectors?
Completion
<Mountaineer Kilian listens as you relate what the captive prospectors told you.>
They mentioned Kronus and a war against stone giants? You're certain?
So Raegar's instincts were right. We have to find a way to get in there and learn more about their plans.
Notes
Both Prospectors Torgan and Varana are in cages outside the various buildings of Dun Argol. Prospector Gann is inside one of the buildings.
says: Those irons are crazy! They keep talking about serving their 'master Loken' but from what I can tell, only a few receive orders from him.
That the quest completion text refers to Kronus is probably a continuity error. It appears that Prospector Varana originally mentioned Kronus, but was later patched.