Bósi has read more of the Book of Mazarbul, and is worried about Brogur's haste.
'It is worse than I expected, ${PLAYER}: Balin's final lot was grim. I have not yet read all, but there is much here we should take as a warning. They were greatly outnumbered, but seemed not to know this until it was too late.
'Return to the Chamber of Leadership off the Twenty-first Hall, in Zelem-melek, and tell my cousin Brogur to be more cautious. I am worried that if we do not take lessons from Balin's expedition, we may be doomed to his fate.
'Perhaps I am overreacting -- indeed I hope that is the case. Regardless, bring my warning to Brogur as quickly as you may.'
Brogur is in the Chamber of Leadership off the Twenty-first Hall, in Zelem-melek.
Bósi is worried by what he has read of Balin's fate in the Book of Mazarbul, and wants you to warn his cousin to be more cautious.