**Antique Karl May Adventure Book – In de gewelven van Ortry, circa 1925–1926** An attractive vintage Dutch-language edition of *In de gewelven van Ortry* by Karl May, the celebrated German author known for his adventure novels. Published by A.G. Schoonderbeek in Laren, the Netherlands, as part of *Karl May's Avontuurlijke Verhalen*. The title page credits C. van der Tonge-Koster for the Dutch adaptation, based on the 80th-thousand edition of the German publication. The book features a distinctive blue cloth hardcover with a colourful illustration of a Native American rider on horseback. Inside are black-and-white illustrations accompanying the story. **Bibliographic details** - Author: Dr. Karl May - Title: *In de gewelven van Ortry* - Language: Dutch - Publisher: A.G. Schoonderbeek - Place of publication: Laren, Netherlands - Date: circa 1925–1926 - Series: Karl May's Avontuurlijke Verhalen - Dutch adaptation: C. van der Tonge-Koster - Length: 356 pages - Binding: Hardcover with illustrated cloth boards **Condition** Vintage condition with visible signs of age and use. The cloth cover has rubbed and frayed corners and edges, with notable wear to the top and bottom of the spine. The pages show age toning, and a handwritten inscription is present on an endpaper. Please review all photographs carefully. They show the actual book and its condition. A collectible volume for Karl May enthusiasts, collectors of antique adventure literature, and admirers of early twentieth-century Dutch book design. The book will be carefully packed for shipping.