"The Danube" by Walter Jerrold is a travelogue written in the early 20th century. The book serves as an exploration of the Danube River, detailing its scenic beauty, historical significance, and the various cultures and landscapes that it traverses. Jerrold seeks to convey not just the geography of the river, but also the stories and legends that accompany its many banks, embellishing the travel experience. At the start of "The Danube," the author introduces the significance of the river as a travel route for British tourists, especially in contrast to the previously popular Rhine. He discusses various historical accounts and travelers who have chronicled their journeys along the Danube, emphasizing its rich history and picturesque landscapes. Jerrold also sets his intention to capture the scenic qualities and notable sites of the river as it flows through key locations, starting from its origins and navigating through various towns, villages, and historical landmarks. The opening establishes a framework for a vivid and immersive exploration of this iconic waterway, inviting readers to engage with both its natural beauty and its storied past. (This is an automatically generated summary.)