... Invisible Empire, a somewhat loosely organized secret society which originated in Tennessee during the turmoil immediately after the close of the war. In theory and practice its operations were simple and effective. Its chief officials were the Grand Wizard, the Grand Dragon, the Grand Titan. Local branches were Dens, each headed by a Grand Cyclops. The Den worked usually at night, when the members assembled clad in long white robes and white masks or hoods, discussed cases which needed attention, and then rode forth on horses ... — The United States Since The Civil War • Charles Ramsdell Lingley