1850 appeared The Black Tulip, a romantic adventure set in the 17th century Holland. In the middle of the political struggle for freedom is Cornelius van Baerle, a young man who has devoted himself to tulip-growing. Cornelius is falsely imprisoned for high treason. With the help of Rosa, the daughter of a jailer, he manages to grow a black tulip. Cornelius wins his freedom and hundred thousand guilders in glittering gold pieces as reward for the tulip. "This tulip," continued the Prince, "will therefore bear the name of its producer, and figure in the catalogue under the title, Tulipa nigra Rosa Barlaensis, because of the name Van Baerle, which will henceforth be the name of this damsel."