William John Cavendish-Scott-Bentinck the 5th Duke of Portland was a famous 19th century eccentric. He never wanted to meet anyone and so spent most of his time in 4 or 5 rooms within his enormous mansion. He communicated with people in written form with correspondence being posted through letterboxes in his bedroom door, his meals were brought to him by a miniature railway, he only went outside at night and all the servants were told to ignore his presence should they ever see him.