Vor'takh is right -- we cannot allow this opportunity to slip through our fingers.
Fortunately, I think I know of a way to translate the journal of this Brann.
The shamans of the Redfang furbolgs, who congregate at the Heart's Blood Shrine south of the camp, grow an herb known as spiritsbreath. An experienced mystic can use incense made from it to seek wisdom from the spirits of the ancestors.
Seek out the shaman known as Grumbald One-Eye. He should carry the herb for his devotions to Ursoc.