Note IX-50 — Chapter IX · ANTIQUITIES OF THE CENTRAL PLATEAUX.
Reading edition
Alzate y Ramirez, Gacetas, Oct. 2, 1792, reprint, tom. ii., pp. 457-9; Löwenstern, Mexique, pp. 260-5, and scattered remarks, pp. 273-81; Id., in Lond. Geog. Soc., Jour., vol. xi., p. 107.