Confined in Bedlam in 1797 as an incurable lunatic, James Tilly Matthews is one of the most bizarre case studies in the annals of psychiatry. Often cited as the first thorough case study of what we would today call paranoid schizophrenia, Matthews drew intricate diagrams of the "influencing machine" that he believed to be reading and controlling his mind. But his case was even stranger than his doctors realized: many of the incredible conspiracies...