The hunter of the Avanc-lûth named Gwin, who brought you safely to Carreglyn through Wulf's Cleft, met you in Galtrev and asked you to seek out a Dunlending who escaped captivity from the dungeons of Orthanc.
'Greetings, ${PLAYER}, we meet again. I cannot help but believe the Avanc-gwirod, the great spirit of the Avanc, guided us here for a purpose. Indeed, I have learned through my countrymen and members of the Boar-clan resistance that you have actually been imprisoned within and escaped from the bowels of Orthanc!
'What you may not know is that some of those Dunlending prisoners you aided also survived, and one has taken refuge with some Ox-clan merchants in Nan Curunír. He sends word through the Boar-clan that Isengard has emptied and may be ripe for attack.
'Perhaps you and your friends from the north might be willing to meet with this man and learn his intentions? If so, you may wish to take this boy with you...I found him starving in the wilds of Carreglyn and brought him here, but he claims his father was taken by Saruman and is determined to find his way to Isengard. He will not listen to my reason.'
The escaped Dunlending prisoner is at a camp of Ox-clan merchants outside of Isengard in Nan Curunír.
Gwin asked you to speak with a Dunlending who escaped from the dungeons of Orthanc during your own flight from there with Baldgar, after the Falcon-clan's betrayal.