[9]. Higginson, Thomas W. Army Life in a Black Regiment. (Boston, 1870.)
[10]. Swann, James G. The Northwest Coast. (New York, 1857.)
[11]. Friend, Henry. Flowers and Flower Lore. (London, 1883.)
[12]. Spence, Lewis. Myths of the North American Indians. (London, 1914.)
[13]. Doughty, Charles M. Wanderings in Arabia. (London, 1908.)
[14]. Keane, John F. T. Six Months in the Hejaz. (London, 1887.)
[15]. Layard, Edward L. The Birds of South Africa. (London, 1875–6.)
[16]. Candler, Edmund. The Unveiling of Lhasa. (London, 1905.)
[a]17]. Tylor, Edward B. Primitive Culture. (New York, 1920.)
[18]. Kay, Charles de. Bird Gods of Ancient Europe. (New York, 1898.)