This book tells the tale of Madoc ab Owain Gwynedd, a Welsh prince who, according to Welsh folklore, sailed to America in 1170, several centuries before Christopher Columbus. The legend suggests that Madoc fled from violence at home and embarked on a sea voyage, eventually reaching the Americas. The Madoc story evolved from a medieval tradition about a Welsh hero's voyage, and gained prominence during the Elizabethan era when English and Welsh writers used it as evidence of England's prior discovery and legal possession of North America. The book delves into the history and mythology surrounding this intriguing legend, examining its origins, evolution, and cultural significance.