On a Whitmonday afternoon in 1828, a stumbling youth appeared in a Nuremberg square, clutching a letter to a cavalry captain and claiming he had spent his entire life in a dark cellar. Europe was instantly captivated. Was this strange boy the stolen Crown Prince of Baden, or merely a cunning imposter with a talent for deception? From the sensation of his discovery to the bloody knife wound that ended his life, this vintage account examines the evidence behind one of the nineteenth century’s most enduring and controversial puzzles.