In Providence, in the United States, an old abandoned house has a sinister reputation: for more than a century, the people who have lived there have fallen ill and died one after another. The narrator and his uncle, an old doctor, search the town's archives. Then they decide to spend the night in the cellar, where a strange mould traces a human shape on the floor.
Lovecraft set this short tale in a real street of his home town, and the fear grows little by little, from what you sense more than from what you see.
You can read it in one sitting in the language you are learning.
