Spirits of earth : the effigy mound landscape of Madison and the Four Lakes / Robert A. Birmingham.
At one time boasting an estimated 1,200 preserved mounds of various types, the Four Lakes region of present-day Madison, Wisconsin, was a major center of a Native American culture that built huge effigy earthworks from A.D. 700 to 1100. Shaped as birds, bears, spirit beings, and other figures, many...
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