J. G. Frazer: The Golden Bough. 14 vols. 1914. John Fiske: Myths and Mythmakers. 1873.
John Brand: Observations on Popular Antiquities. A new edition with the additions of Sir Henry Ellis. 1900.
Charles Hardwick: Traditions, Superstitions, and Folk-lore (chiefly Lancashire and North of England); their Eastern Origin and Mythical Significance. 1872.
Robert Means Lawrence: The Magic of the Horseshoe, with other Fold-lore. 1898.
William George Black: Folk Medicine. 1883.
Thomas Sharper Knowlson: The Origins of Popular Superstitions and Customs. 1910.
Frank W. Nicolson: The Saliva Superstition in Classical Literature. Harvard Studies in Classical Philology, vol. 8. 1897.