The Molly Maguires and the detectives

Secret societies and subversive movements

Nesta Helen Webster

Mysticism and its results: Being an inquiry into the uses and abuses of secrecy

John Delafield

Mysteria: History of the secret doctrines and mystic rites of ancient religions and medieval and modern secret orders

Otto Henne am Rhyn

Secret Societies of the Middle Ages

Thomas Keightley

Secret Societies: A Discussion of Their Character and Claims

Macdill, David; Beecher, Edward; Blanchard, Jonathan

Life on the Mississippi

Mark Twain