Norbel's Tattered Letter

SPOILER FOR: NEW PARTY MEMBERS 7/9/19

Origin
Grail received a tattered, splotched, and rather gross looking letter from his uncle Norbel. Norbel is an eccentric fellow who had disappeared hunting myths. This is the first time any dwarf in the family has heard from him. He shared this letter with the party when he realized it was directly relevant to what was happening beneath their noses.

Questions
What does it say?

What did Norbel find?

Where is Norbel?

Norbel’s Letter: My Dearest G… I’ve done it! … … … doubted me… … … … … … … sole own… …ragon Maw … … … my dear boy! Come soon, I need … … … … … … … … … … … untimely dem… …. … … … heir. … … …ngar …kbottom … River… … … wary … … A… …Brigade … Vol…n Lord … D… … Pass, Norbel Forgefall