The Undeep Watch is very concerned with the Easterling movements at the South Undeep.
'We have spotted Easterlings moving along the shore, and also a great bird circling overhead. An eagle, perhaps? But...I find that I cannot bear to look at it for long, for my heart fills with dread.
'I am loath to venture down to the South Undeep to see what evil is afoot with our foes, but I know it must be something terrible. If you have a stout heart, by all means go take a look. But I will not judge you for fleeing.
'All I know is that the Thane will not react without evidence. He is too practical to risk Langhold for naught but a chill upon the air....'
The Easterling camp can be found at the South Undeep.
A fenced-in area can be found behind the Easterling camp at the South Undeep.
You should peek into the fenced-in area to see if anything is amiss.
Adbert is at his post at the Undeep Watch.
You should return to Adbert with news of the Nazgûl's presence in the Easterling camp, along with the brigands poised to attack Langhold with aid from Mordor.