The school did not want a fifteen-year-old boy's invention to be better than their own heavy books and would not let students read Braille books. Nevertheless, the students continued to read them. Finally, after twenty years, the school agreed to use Braille.
Louis Braille spent the rest of his life trying to tell the world about Braille. But nobody cared. Louis was unlucky again. He became very sick. Even when he was sick in his bed, he continued to write books in Braille for the students at his school. A few years later, Louis Braille died at age forty-three.