Mike Jay, A Visionary Madness: The Case of James Tilly Matthews and the Influencing Machine

Come the revolution, however, mesmerism was reconceived once more. From its beginnings many had seen it as an aristocratic fad: Mesmer (by this stage long gone to Germany and Switzerland) had made a fortune from the nobility, charged the huge fee of 100 livres for admission to his Society of Universal Harmony, and even been offered a pension for life by Marie-Antoinette.