Ernest Bramah (2016). “ERNEST BRAMAH Ultimate Collection: 20+ Novels & Short Stories (Including Max Carrados Mysteries and Kai Lung Fantasy Stories): The Secret of the League, The Coin of Dionysius, The Game Played In the Dark, The Tilling Shaw Mystery, Kai Lung's Golden Hours, The Confession of Kai Lung, The Mirror of Kong Ho and many more”, p.194, e-artnow
George Catlin (1841). “The Manners, Customs, and Condition of the North-American Indians, by Geo. Catlin: With Four Hundred Illustrations, Etched and Outlined, from His Original Paintings Now Exhibiting in His Indian Museum, Egyptian Hall, London”, p.46