The Mark of Cain

The Mark of Cain is a 1947 British drama film directed by Brian Desmond Hurst and starring Eric Portman, Sally Gray, Patrick Holt and Dermot Walsh. The film is based on the 1943 novel Airing in a Closed Carriage by Marjorie Bowen, which in turn was based on the true life murder trial of Florence Maybrick. It was made at Denham Studios with sets designed by the art director Alex Vetchinsky. Plot English industrialist Richard Howard visits Bordeaux, France to buy cotton for his mills from Sarah Bonheur, He becomes enamoured by Sarah and spends much of his business trip sight-seeing. When his younger brother, John arrives to close the deal, he also is attracted to Sarah, and after a whirlwind courtship, marries her. When living a lonely existence in John's grand house in Manchester, England, Sarah confides to Richard that she is depressed by her marriage. Richard encourages her to divorce John and run off with him. Sarah consults a lawyer, but finally ignores Richard's advice, and somehow reconciles with her husband. Seeking revenge, Richard then poisons his brother and attempts to frame Sarah for the murder. Dr. White is suspicious of the circumstances behind John’s rapid decline, and after his death, Sarah’s purchase of arsenic casts suspicion on her. In standing trial for murder, Richard defends Sarah thinking he will win her love, but she is found guilty. Another suitor, Jerome Thorn, is convinced he knows the identity of the poisoner, and comes to Sarah's aid.