Observations on the aboriginal monuments of the Mississippi Valley. The character of the ancient earth-works, and the structure, contents, and purposes of the mounds; with notices of the minor remains of ancient art / With illustrations. From the second volume of the Transactions of the American ethnological society.

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Observations on the aboriginal monuments of the Mississippi Valley. The character of the ancient earth-works, and the structure, contents, and purposes of the mounds; with notices of the minor remains of ancient art / With illustrations. From the second volume of the Transactions of the American ethnological society. Public Domain Mark. Source: Wellcome Collection.