... the phratries which are said to have migrated from the far south. I believe we must look toward the east, whence the ancestors of the Kokop or Firewood people are reputed to have come, for the origin of the symbolic markings of the snakes represented on Sikyatki ceramics. Figures of apodal reptiles, with feathers represented on their heads, occur in Sikyatki pictography, although there is no resemblance in the markings of their bodies to those of modern pictures. One of the most striking of these occurs ... — Archeological Expedition to Arizona in 1895 • Jesse Walter Fewkes
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