'The text you recovered told of an alliance between Angmar and Saruman. I have done some research and the White Hand has sent an emissary to treat with Angmar.
'You should investigate the matter. There have been many reports of Orcs near the tower of Minas Caul near Barad Gularan. We must stop this alliance from happening, no matter the cost.
'Defeat the emissary, the half-orc Bâlak, and return back to me when the deed is done. You will want to take allies if you are to succeed!'
Having intercepted a pledge from Saruman of Isengard, you must enter Minas Caul and defeat his emissary to stop an alliance between the Iron Crown and the White Hand.
You must travel to Barad Gularan and issue a challenge to Bâlak, the emissary of the White-hand, inside Minas Caul.