Dead Hermit's Note is a written note found in Dishonored.
I remember sailing out on this river to the great Ocean, that vast blinding light and blue water. I was a tender fifteen and our nets were always full to bursting. The old days, before everything went to shit.
It can be found during the mission Dishonored in the section of the Dunwall Sewers where three guards are patrolling. It is on the bench in the hermit's room, hidden behind some planks on one of the walls.