Unsent Letter to the High Overseer is a written note found in Dishonored 2.
Esteemed High Overseer Khulan, I hope you're in good health, and not too nostalgic for Wei-Ghon, which I'm told is striking this time of year. Forgive my stream of letters, but our problems in Serkonos are significant. Any insights you can offer would be welcome.
Duke Abele is a travesty, openly disdainful for the Abbey, and yet I must maintain relations with him for the welfare of this nation. You've been called a unifier, something the Abbey greatly needed after the horrors of the Rat Plague. So your guidance would be of value.
Lastly, my recent correspondence with our Oracular Sisters has been troubling. Their responses have arrived after marked delay, and their recent proclamations possess an unusual cadence.
Yours in faith,
The note can be found on the third floor of the Overseers Outpost during the mission Edge of the World.