Note IV-76 — Chapter IV · THE TOLTEC PERIOD.
Reading edition
Brasseur de Bourbourg, Hist. Nat. Civ., tom. i., pp. 410-23. I suppose that this information was taken from the Codex Gondra already quoted—see p. 230 of this volume—and applied by the same author in another work, and with apparently better reasons, to the overthrow of the great original Nahua empire in the south.