The secret societies of all ages and countries, embracing the mysteries of ancient India, China, Japan, Egypt, Mexico, Peru, Greece, and Scandinavia, the Cabbalists, early Christians, heretics, Assassins, Thugs, Templars, the Vehm and Inquisition, mystics, Rosicrucians, Illuminati, Freemasons, Skopzi, Camorristi, Carbonari, nihilists, and other sects
Heckethorn, Charles William