The Mad Hatter - The Hatter is a fictional character initially encountered at a tea party in Lewis Carroll's Alice's Adventures in Wonderland and later again as "Hatta" in the story's sequel, Through the Looking Glass. He is popularly referred to as the "Mad Hatter," but is never called by this name in Carroll's book - although the Cheshire Cat does warn Alice that he is mad, and the Hatter's eccentric behaviour supports this. (Likewise, the chapter in which he first appears, "A Mad Tea-Party", is often called "The Mad Hatter's Tea Party").