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Engraving on shell from Spiro Mounds,Oklahoma showing winged rattlesnake-panther beings around across-and-circle symbol.
Hamilton, H.W. 1952. The Spiro Mound with a Preface by J.A. Brown, and including An Interpretation of the Place of Spiro Mound by Charles C. Willoughby. Missouri Archaeologist Vol. 14. SEE ALSO Howard, J.H. 1968. The Southeastern Ceremonial Complex and itsInterpretation. Memoir of the Missouri Archaeological Society No. 6. Image courtesy of Missouri Archaeologist.