Emily's Letter is a written note found in Dishonored.
Transcript[]
Corvo,
I am very sad. They say that you're dead like Mother, but I'm going to put this note in a bottle and throw it into the river because I do not believe them. Living here is very strange. I do not like it, so please come for me if you can.
Location[]
It can be found the first time Corvo visits the Void, floating near Emily Kaldwin's hand.