Knowledge Fortune

Part of Madam Eva's Fortunes regarding Strahd von Zarovich

Knowledge  "This cards tells of history, our history. Knowledge (..) ancient  so you better understand the enemy" 

The Charlatan "I see a lonely mill on a precipice. The treasure lies within"

Strahd's journal was found in The Windmill in the Ethereal Plane in the The Coven's possession.