Missive from Stalwart is a document in Pillars of Eternity II: Deadfire.
[Player Name] -
Rumor has it your keep's in worse shape than Durgan's Battery was when you first found it. After all you did for Stalwart, I'd have hoped you'd earned a break from anyone stomping through your home.
You should know I'm keeping the battery cannons warm, just in case that big blue fella gets it in his head to come our way. Thanks to you, we've got more than enough firepower for anything that turns up here!
So I figure at least one of these beauties is yours by rights. Anyway, you oughtta have something to remember us by.
(Also, Haeferic found out I'd named this one after a part of him, and not the one he'd hoped. Swore I'd never drink again at the Gréf's Rest unless I got rid of it. So you think of me when you're blasting Haeferic's Nose on the high seas!)
And if you ever wanna take a break from adventuring and light things on fire, you know where to find me.