A Dunlending named Cariad has offered to work together, citing a common goal.
'I am Cariad. I'll spare you the details, but I've spotted numerous craban spies belonging to the White Hand in the wilderness north-east of here. Why don't you help me defeat a few of them? I promise I'll answer your questions afterwards.
'Oh, I'm no fool -- I don't quite trust you yet. Consider it a wager.'
Cariad has suggested clearing craban spies from the wilderness north-east of the Cuan-lûth refuge.
Cariad is waiting for you at the entrance of the Cuan-lûth refuge.
You should talk to him there.