Éomer has told you where to go to find the Uruks his men destroyed. It is possible you will find your lost friends at the site.
'My men caught up with the Uruks just outside the eaves of Fangorn, to the north-west. Their leader, a fierce Uruk whose name seemed to be Uglúk, if the panicked words of his fellows can be trusted, fought me blade to blade after I dismounted.
'I proved the better swordsman, to the pride of Éomund and the shame of whatever disgusting lout claimed to sire Uglúk.
'Ride to this site and look for signs of your missing friends or Aragorn and his two companions. If my men and I are still here when you return, you are welcome to ride south with us to Edoras.'
Éomer's Vengeance can be found to the north-west of Eaworth, just outside the eaves of Fangorn.
Éomer has said you should look for signs of your friends at the site where he encountered and destroyed the Uruks led by Uglúk.
Uglúk and Éomer fought personally at the end of the battle, but Uglúk did not walk away.
The ground at Éomer's Vengeance is torn up by a confused muddle of footprints. Can anything be learned from it?
Corudan wishes to speak with you at Éomer's Vengeance.
You have found a number of footprints that seem to go toward the Forest of Fangorn, and should speak to Corudan about it.
Horn is waiting to speak with you at Éomer's Vengeance, north-west of Eaworth.