Note VII-59 — Chapter VII · ANTIQUITIES OF OAJACA AND GUERRERO.
Reading edition
Charnay, Ruines Amér., p. 263, phot. iii.-iv.; Dupaix, 2d exped., pp. 33, 35-6, pl. xxxvi., fig. 83; Kingsborough, vol. v., p. 259, vol. vi., p. 451, vol. iv., pl. xxxiv., fig. 88, this plan differs from the one given above in making the passage d straight. Ilustracion Mej., tom. ii., p. 496.