emblematic mounds, [400];
the most ancient, [402];
believed to be of the Indian race, [400], [401], [402];
earliest advocates of this view, [400];
vanished race view, [400], [401], [402];
Great Serpent mound, [401];
no clue to their language, [401];
mounds in New York built by the Iroquois, [402];
date of their living, [402];
divisions of the United States by their characteristics, [402];