CHAPTER XIX.
Mounds and Earthworks in North and Central America. — Migrations of the Toltecs and Aztecs. — The Quichés. — Aboriginal races. — Palenque. — Hieroglyphs. — Temples. — Desertion of the Temples and stone buildings in Yucatan. — Conquest of Yucatan by the Aztecs. — Antiquity of Palenque and Uxmal. — Aztec custom of imprisoning captives in cages and sacrificing them to the gods. — Civilisation of the Toltecs. — Note upon the symbol or Totem of the Serpent 378