A whole book weighed 400 pounds! By age eleven, louis had read all fourteen book. So every evening, he tried to find a way for blind people to be able to read books. One day, captain charles barbier, a French soldier, came to speak at the school. Barbier had invented night-writing. This system used dots for the letters of the alphabet. Soldiers could feel the dots with their fingers and read with no light. Barbier thought night-writing could also help blind people