criminals around them. The content of the book is structured as a dictionary, presenting an extensive list of terms, phrases, and their meanings, specifically featuring argotic expressions used in various contexts, including crime and everyday interactions among the underclass. Halbert also includes examples of contemporary crimes and schemes, illustrating how the language is utilized in real-life scenarios. This work not only serves as a reference for understanding criminal slang but also organizes the information thematically, making it a resourceful guide for anyone interested in the cultural and linguistic aspects of the lower class in Paris during that era. (This is an automatically generated summary.)