- Main article: Books (Orsinium)
- Location: On a rock in Coldperch Cavern
- Author: Anonymous
Warlord Uchuiran wouldn't explain anything to me, but I think I figured out the cause of the disappearances. I witnessed the warlord's lover, the hagraven Kraala, use a stuffed bird totem to transform one of our prisoners into a bird.
I fear that the hagraven isn't restricting her transformations to just prisoners. I think she's using the totem on our own people! You should leave as soon as possible. I will -
<A smear of dried blood obscures the rest of this letter>
- Reading the note will start the quest Birdsong's Curse.
- Unlike most readable materials, Winterborn's Note is displayed as dialogue text in-game.