A Rohirrim messenger disappeared when travelling to bring word to Forthbrond.
'Recently, Cadthorn, one of our messengers, failed to report back. He is a capable courier that had gone to receive word from Edoras regarding our strategic goals for Forthbrond.
'Will you set forth and discover Cadthorn's location?
'Begin your search to the north and slightly west from here along the cliff walls. Surely, he has set forth from Edoras already.'
The missing messenger might be found somewhere to the north and west of Forthbrond.
Ardwyn has asked you to find Cadforn, a messenger who is late returning to Forthbrond.
Ardwyn is at Forthbrond, to the south and east of Cadthorn's position.
You should return to Ardwyn with Cadthorn's message.