The letter says that General Jarl has met secretly with the leader of Blackfire City. It also discusses a dark crystal hidden beneath Moore Crater, guarded by a mysterious Goblin kingdom.
Calder, the rebel leader, was there, and the letter says the Crimson Sawtooth Army and the Goblins have struck some sort of deal.
I need more information. I hear there's a Golden City Permit Book on Fire God's Altar about these Goblins. Please get me the book!