Widdershins

A collection of nine marvellous stories of the supernatural. The Edwardian era was the last great period of the English ghost story, and Oliver Onion's "Widdershins" is one of the classic collections of the age. Although each of the nine stories here is worth reading, the collection is famous because of "The Beckoning Fair One," a novella of ghostly obsession and mental disintegration just as powerful as Henry James' "The Turn of the Screw."
"The Beckoning Fair One" is one of the most oft-anthologized horror tales. This ghost story has been called one of the best in the English language by such luminaries as Algernon Blackwood and H. P. Lovecraft.

The tale concerns an author who moves into a deserted house and starts to become influenced by its ghostly female occupant? Or...is it just in his mind?