A Note From Abigail Ames is a written note found in The Brigmore Witches.
Accept this as a small token of my appreciation for the work we did together in Rothwild's place. My sources say that this is the sort of thing you would go out of your way to find. May it protect you, or empower you, or whatever these things do. I hope we find ourselves on the same side of a cause in the future. You are a great ally.
It can be found in Jerome's safe along with a bone charm if Daud helped Abigail Ames destroy the Rothwild Slaughterhouse in The Knife of Dunwall and if he purchases the favor A Gift From Abigail Ames.