The Black Tulip

 ' I have read this letter and now I know the truth,' Prince William said to the people. 'Cornelius Van Baerle is not a traitor. The people of The Hague killed John and Cornelius De Witt. But the people did a bad thing! The De Witt brothers were not traitors. They were both good men. They loved their country.' (p. 63)

 This story is that a horticultural society held a convention. It's that if you could grow up a black tulip, you can get many prize. So Cornelius and Isaac tried to grow up the black tulip to get the money.

Alexandre Dumas.(2005).The Black Tulip;Macmillan