Samuel George Morton,
Some Observations on the Ethnography and Archaeology of the American Aborigines
“ In fact, these last named ruins appear to date with the primitive wanderings of the cultivated tribes, before they established their seats in Yucatan and Guatimala, and erected those more finished monuments which could only result from the combined efforts of populous communities, acting under the favorable influence of peace and prosperity. Every race has had its center or centers of comparative civilization. The American aborigines had theirs in Peru, Bogota and Mexico. ”
