William Hope Hodgson 
The House on the Borderland [EPUB ebook] 

The House on the Borderland tells the story of an ancient house in a lonely part of Ireland, where an old man lives alone with his sister and his pets. His diary is found and it tells the story of a huge cavern below the house filled with white pig like monsters. The old man has had to flight these creatures. He then sees his house in an alternate space-time plain that is isolated from the rest of his world. This haunting tale conveys intense isolations and loneliness.