features of the book, explaining the route organization and how to navigate the described areas effectively. Black emphasizes the significance of railways and branch lines in accessing towns and resorts, particularly for those seeking therapeutic baths in locations like Vichy and Aix. The preface warns travelers of the need for caution regarding temperature changes during visits to winter resorts and provides recommendations for maintaining a healthy regimen while traveling. Some practical travel advice, such as obtaining a passport and understanding the dining customs, is also highlighted, setting the stage for a comprehensive exploration of the east half of southern France. (This is an automatically generated summary.)