The Lost Casket is a novel written by French author F. De Boisgobey and was first published in 1881. The book is a thrilling mystery that follows the story of a young woman named Marie who is left a mysterious casket by her late father. The casket contains a secret that could change her life forever, but she soon discovers that it has been stolen. With the help of a detective named Monsieur Lecoq, Marie sets out on a dangerous journey to find the...