See Edmonson, Popol Vuh, 17. For the Maya at the conquest and in modern times, see Tozzer, "Landa's Relacion," 117, 130; on the Huastec Indians of the Gulf Coast, see Guy Stresser-Pean, "Ancient Sources on the Huasteca," in Archaeology of Northern Mesoamerica, Part 2, vol. 11 of Handbook of Middle American Indians, ed. Gordon F. Ekholm and Ignacio Bernal (Austin:University of Texas Press, 1971), 600; for the Aztec scrying in a polished obsidian surface, virtually a "mirror," see Nicholson, "Religion," 440.