Max Brand & William F. Nolan 
The Darkness at Windon Manor [EPUB ebook] 

Something natural—or supernatural—enters the soul of Andrew Creel, a commonplace young man, and drives him into a swift game where death is a probability on the one side and love only a possibility on the other. Creel plays it to the end: an end unlike the end that seemed so sure when dusk fell on the garden of that charming mansion with its sinister residents. Author Max Brand graced the pages of Argosy with this tale of mistaken identity, a femme fatale, and a haul of stolen jewels in a never-before reprinted story, along with an all-new introduction by Brand historian William F. Nolan (Logan’s Run).