Prehistoric North America [electronic resource] / by W J McGee, LL. D., director, Saint Louis Public Museum, chief of the Department of Anthropology ; formerly ethnologist in charge, Bureau of American Ethnology ; author of: Pleistocene history of Northeastern Iowa ; Geology of Chesapeake Bay ; The Lafayette formation ; The potable waters of Eastern United States ; Geologic map of the United States ; The Siouan Indians ; Primitive trephining in Peru ; The Seri Indians, et cetera, etc ; and Cyrus Thomas, Ph. D., archaeologist in the Bureau of American Ethnology ; author of: Study of the manuscript Troano ; Notes on certain Maya and Mexican manuscripts ; The Cherokees and Shawnees in Pre-Columbian times ; Numerical systems of the Mexican and Central American tribes ; The Mayan calendar systems, et cetera, et cetera.