Final answer:
The question revolves around the discovery made by the police in Caderousse's vest pocket in the novel 'The Count of Monte Cristo' by Alexandre Dumas.
Step-by-step explanation:
The student is asking about a plot detail from the novel The Count of Monte Cristo by Alexandre Dumas. The Count narrates an incident involving a character named Caderousse breaking into his home. The police investigated and searched Caderousse's vest pocket.
The question is about what the police found in Caderousse's vest pocket. Since this is a query about a specific event in a piece of literature, the answer should reflect knowledge of the book's narrative and characters.
In the story, Count of Monte Cristo told Danglars about Caderousse's break-in at his home, and how the police had recently examined Caderousse's vest pocket.
The police found a snuff-box which belonged to the Count. This was significant because the Count had previously mentioned that the snuff-box held a valuable secret, and finding it in Caderousse's possession implicated him in the crime.