The Poison Principle

Book excerpt: Memoir about the author's grandfather's 1927 poisoning of his two sons, a deed which was subsequently covered up by his wife and sister. Examines the consequences of her grandfather's crime and ruminates on links with the great cases of the 19th century - in myths, fiction and poison lore. Tells of the workings of arsenic, cyanide and strychnine and why it is so hard to poison someone these days. Questions whether it was ever easy. Explores themes of death, deceit and language. Author has published short stories, travel journalism, and writings on medicines and poisons.