Boots Who Made the Princess Say That's A Story

Sir George Webbe Dasent (1817--1896) was a famous English translator of numerous folk tales, lots of literature works and mythological stories of different cultures.
The story will retail about a wise young boy named Boots who got luck to take the Princess to wife and half the kingdom besides only for one ordinary thing. He had a mission to made the Princess Say, "That's A Story". But what for?