Maigret and the St. Fiacre Case

Inspector Maigret is traveling to the French countryside to visit his friend, the duchess of Saint-Fiacre. She has received a letter recently stating that she will die soon. A few days later she does so by an heart attack, but Maigre
Police Commissioner Jules Maigret returns to the small village where he spent his childhood at the request of the Countess of Saint-Fiacre, who has received a disturbing anonymous letter.