Atwater was recognized by contemporaries as a "pioneer" in the study of the mounds or massive earthworks in the Ohio Valley; these are now known to have been constructed by ancient Native Americans of the United States.
Atwater was recognized by contemporaries as a "pioneer" in the study of the mounds. Atwater was recognized by contemporaries as a "pioneer" in massive earthworks in the Ohio Valley. These are now known to have been constructed by ancient Native Americans of the United States.