Madrid Codex, VIII, 192v, as quoted in León-Portilla, p. 155.
León-Portilla, Miguel. Aztec Thought and Culture: A Study of the Ancient Náhuatl Mind. Civilization of the American Indian series, no. 67. Jack Emory Davis (trans.). Norman: University of Oklahoma Press. 1963. OCLC 181727. Note that León-Portilla finds Tlacaelel to be the instigator of this burning, despite lack of specific historical evidence.
