1751: The Poisoning of Francis Blandy by His Own Daughter
Francis Blandy, a lawyer and town clerk of Henley-on-Thames, died in August 1751 after his daughter Mary repeatedly dosed his food with arsenic. The powder had been supplied by her lover, Captain William Henry Cranstoun, a Scottish officer who was already secretly married. Cranstoun told Mary the powder would make her father more accepting of their betrothal. His death became one of the earliest criminal cases to feature scientific toxicological evidence.
Mary was arrested after servants and relatives raised suspicions. Tried at Oxford in February 1752, she was convicted of murder and hanged on 6 April 1752, protesting her innocence to the end. Cranstoun escaped justice in court but died of illness in December 1752.
