Claude Alexander Conlin (1880–1954), also known as Alexander, C. Alexander, Alexander the Crystal Seer, and Alexander the Man Who Knows, was a vaudeville magician who specialized in mentalism and psychic reading acts, dressed in Oriental style robes and a feathered turban, and often used a crystal ball as a prop. In addition to performing, he also worked privately for clients, giving readings. He was the author of several pitch books, New Thought pamphlets, and psychology books, as well as texts for stage performers. His stage name was "Alexander," and as an author he wrote under the name "C. Alexander."