Using the items and information you brought to him, Saeradan believes that it is a certainty that Saruman the White has a hand in the strange happenings in the Windfells.
'${PLAYER}, the banner you found is itself enough evidence that Saruman the White stirs trouble in this land, but the evils which you have encountered speak to a much more sinister plan.
'You should go to Grufudh and learn if he has encountered any emissaries of the White Hand, and if so, what the emissary desired of his people.
'Grufudh and his goatherds are at Gavar Cadlus to the east.'
Grufudh is at Gavar Cadlus, north-east of Echad Saeradan.
Saeradan instructed you to speak with Grufudh about the banner of the White Hand that you found near Gwyllion's Gate.
Gwyllion's Gate, the entrance to the path which leads to Gwyllion's hut, lies to the south of Gavar Cadlus.
Grufudh told you to speak with Gwyllion, the Old Woman of the Mountain, if you wished to know the source of the White Hand banner.
Saeradan is at Echad Saeradan, west of Gwyllion's Gate.
You should return to Saeradan with news of your discovery of the Uruk-hai Filskûm at Gwyllion's hut.