The long divorce

From the blog Classic Mysteries: "The little English town of Cotten Abbas is being plagued by someone who is sending anonymous poisoned pen letters to people in the town. Letters of this type usually accuse the recipient either of some crime or of some major breach of morality. If there is any degree of truth in the letters, they can be deadly, and they would appear to be the reason behind at least one death in Cotten Abbas. The mysterious Mr. Datchery, newly arrived in Cotten Abbas, rather clearly knows more than he is saying about the letters and their source. But it will become a case of…