It’s in one of the tents in one of the four Goblin encampments where you get
the keys. I think it’s random, but it’s usually not in the chieftain tents.
Look for a writing desk.
Sent from Mail for Windows 10
From: Tobias Vinteus
Sent: Tuesday, March 6, 2018 11:17 AM
Subject: [blind-gamers] A Hero's call: A House Devided
I have found two of the conspirational letters: One in the infirmary, the
other in the large tent in the goblin settlement. Where is the third? I've
been scouring both the castle and the settlement for hours!