James Tilley Mathews was a London Tea merchant. In Paris in 1793 he obtained a knowldedge of Mesmerism. Distressed by the outbreak of hostilities between England and France, he planned to use the Mesmeric doctrine of harmony to mount a peace mission. Following an audience with Lord Liverpool, he prepared to negotiate with the French. The Jacobins, however, seized power. They were hostile to Mesmerism, as a fashionable aristocratic decadence, and distrusted him. Mathews was jailed and only made it back to England in 1796. By then he convinced that there was a French plot to steal British government secrets and that it had fallen to him to be Britain's savior. He believed that what he called "magnetic spies" had infiltrated England and had stationed themselves in strategic locations. Because of his earlier associations with Mesmerism, Mathews was privy to all this, and so he became number one on their hit-list. Eventually he was confined to Bethlem Hospital. In 1809 his family pressed for his release, and had two distinguished physicians testify that he was sane. They were opposed by the medical staff at Bethlem, who argued that he was as obsessed as ever. John Haslam, the Bethlem apothecary, believed that the best way to demonstrate Mathews' continuing delusions was to publish Mathews' own story, taken from documents written by Mathews himself, in a mischievous but delightful volume entitled Illustrations of madness: Exhibiting a singular Case of Insanity, and a No Less Remarkable Difference in Medical Opinions: Developing the Nature of An Assailment, And the Manner of Working events; with A Description of the Tortures Experienced by Bomb-Bursting, Lobster-Cracking, and Lengthening the Brain. Embellished with a Curious Plate.
 

From: A Social History of Madness: The World Through the Eyes of the Insane, Roy Porter [E.P. Dutton, New York, 1989] 54-9