The Gateway of the Monster: A Carnacki, the Ghost-Finder Story

"Carnacki, the Ghost-Finder" is a collection of occult detective short stories by English writer William Hope Hodgson. "The Gateway of the Monster" - In an ancient mansion, the bedroom known as the Grey Room was the site of a grisly murder generations ago. Carnacki is summoned to investigate a noisy spirit that tears off the bedclothes and slams the door(s).