Ardwyn has learned that the Rohirrim patrol which encountered the Dunlendings had ranged further north than usual, perhaps inciting the Dunlendings to attack.
'After speaking with the leader of our patrol, I learned that they ranged further south than usual...it is possible that the Dunlendings attacked because we had encroached openly upon their land, though I have my doubts.
'Perhaps you would patrol the valley to the west for me. I have the feeling that there is more to this attack than we understand.'
The patrol path runs through the valley west of Forthbrond.
Ardwyn has asked you to patrol several points for signs of the Dunlendings.
Ardwyn is at Forthbrond, east of the valley.
You should report what you have seen to Ardwyn.