You have located the plans for a secret escape tunnel out of Durin's throne room. If it was ever constructed, it might be used to enter Zabadgathol in secret to rescue Bori.
'I am needed here, Player... there is so much to be done. I swear I will accompany you on the next adventure.
'Return to Orvar in Buzun-ghâr, in the south-eastern corner of Tharâkh Bazân, south-west of here along Durin's Way, and ask him to accompany you on the \qsecret road.\q You may yet rescue my cousin Bori from the clutches of Mazog!'1/1
1 Speak toOrvar (Show dialog)
'You say there is a way behind the walls of Zabadgathol, into Rushdurinul, where Mazog has set his throne? I don't know, Player -- it seems unlikely to me.'
With an eyebrow raised, Orvar listens to your explanation of Bróin's idea that it might be possible to rescue Bori.
'This is all well and good, but why isn't Bróin coming with you on this errand, Player? If you ask me, he's still not over his experience in the watery den of the Watcher. It seems to me that Lord Brogur has been trying to give his son trivial tasks to coax him from this brooding, but it has yet to work. Bróin will not be himself until he is able to conquer whatever fear clutches him.
'No matter. If you descend once again into the depths of Buzun-ghâr, where you stood against Grawulun the Caerog, and can find the entrance to this Zurr-thurkh. I will join you on the other side.'1/1
'You see the good that can be done when Elves and dwarves work together, Player; Mazog was right to fear the alliance and hope that it should never come to pass!
'The dwarf Bróin came to Lossathrod, winded from a long run, and asked that we accompany him in his pursuit of you. He claimed to have made an error by leaving you to attempt the rescue of his kinsman with Orvar alone, and his regret of that decision spurred him onward. You are fortunate that he regained his courage when he did, Player, you and Orvar both!'1/1