'The Dourhands' lord fled to Bree-land after his defeat, and not by mere chance. I see the hand of the Captain of the Nine in all of these affairs, in the west, in the Shire, and in Bree-land. We must unravel the thread of his plans, and I believe I know how.
'To the east of Bree, there is a Blackwold camp which my men have been watching closely. A shadow has recently spread across the camp...I believe it is here that Amdir has gone, and this dwarf-lord as well.
'There we must go, and there we must end Amdir's life, if he can still be called living. We will wait for night-fall and then make our move against the Blackwolds. In the meantime, gather allies, then return to me when you are ready to depart.'
Strider has asked you to help him end Amdir's murderous rampage once and for all.
Strider has instructed you to gather allies, then return to him. At night-fall, he will lead you against Amdir and the Blackwolds.
With the threat of Amdir ended, you should report back to Strider at and see if there is anything else he would have you do.