50 Berkeley Square, which now houses Maggs Bros books, is said to be the most haunted house in London – haunted enough to give any psychic the equivalent of an electric shock, just by touching the external brickwork. 44 Berkeley Square – the former home of Lord Claremont – is said to be more benignly haunted by a servant of Lady Isabella Finch who owned the house in 1742. Naturally, he appears in a periwig and green livery.