[IX-33] Humboldt, Vues, tom. i., pp. 129-37, (fol. ed. pl. ix.); Id., Essai Pol., pp. 189-90; Id., in Antiq. Mex., tom. i., div. ii., pp. 15-17. 'M. Humboldt, ... n'a-t-il pas suivi à la lettre l'inexacte description de la pyramide de Xochicalco par le P. Alzate, et n'a-t-il pas fait dans le dessin qu'il donne de ce monument, une seconde édition des erreurs de son modèle?' Waldeck, Voy. Pitt., p. 69; Nebel, Viage Pintoresco, pl. ix.-x., xix.-xx.; Revista Mexicana, tom. i., pp. 539-50, reprinted in Diccionario Univ. Geog., tom. x., pp. 938-42; Dupaix, 1st exped., pp. 14-18, pl. xxxi.-ii., fig. 33-6; Kingsborough, vol. v., pp. 222-4, vol. iv., pl. xv.-vi.; Lenoir, in Antiq. Mex., tom. ii., div. i., pp. 35-6. Tylor pronounces Castañeda's drawings grossly incorrect. Other accounts by visitors, are found in Latrobe's Rambler, pp. 241-3; Mayer's Mex. as it Was, pp. 180-7; Id., Mex. Aztec, etc., vol. ii., pp. 283-5, with cuts; Id., in Schoolcraft's Arch., vol. vi., pp. 583-4, pl. xi.; Tylor's Anahuac, pp. 183-95; Löwenstern, Mexique, pp. 208-12, 273-81. Other references to compiled accounts are:—Prescott's Mex., vol. iii., pp. 403-4; Carbajal, Hist. Mex., tom. i., pp. 203-4; Armin, Das Heutige Mex., pp. 98-9, cut; Baldwin's Anc. Amer., pp. 89-90; Hartmann, Californien, tom. ii., p. 86; Fossey, Mex., pp. 302-3; Brasseur de Bourbourg, Hist. Nat. Civ., tom. i., p. 329; Larenaudière, Mex. Guat., pp. 46-9, plate; Bradford's Amer. Antiq., pp. 78-9; Malte-Brun, Précis de la Géog., tom. vi., p. 460; Democratic Review, vol. xi., p. 612; Baril, Mexique, p. 70; Cortés' Despatches, p. 244; Priest's Amer. Antiq., pp. 276-7; Macgillivray's Life of Humboldt, p. 308; Delafield's Antiq. Amer., p. 58; Frost's Pict. Hist. Mex., pp. 49-53, cut; Norman's Rambles in Yuc., p. 171; Frost's Great Cities, pp. 295-300, cut; Conder's Mex. Guat., vol. i., pp. 339-40; Illustrated London News, June 1, 1867, cut.

[IX-34] Xochicalco, 'castle of flowers,' according to Diccionario Univ. Geog., tom. x., p. 938.

[IX-35] Alzate's barometrical observations, as reckoned by himself, made the height 289 feet; from the same observations Humboldt makes it 384; 279 feet, Dupaix; 369, Nebel; about 400, Tylor; about 333, Revista Mex.

[IX-36] According to the Revista, the gallery leads south 193 feet (a, b, of plan 83 feet), then west 166 feet (not on plan), and terminates in what seems and is said by the natives to be an intentional obstruction. 83 feet from the entrance (a, c, of plan 16½ feet) a branch leads east 138 feet (c, k, of plan 81 feet) to the room. I have no doubt that these dimensions are more accurate than Dupaix's. The Revista account of the room, so far as it is intelligible, agrees well enough with the plan.

[IX-37] These are the dimensions given in the Revista, 100 by 87 mètres. Dupaix, 1st exped., p. 15, says 89 by 102 varas.

[IX-38] Dimensions in English feet—length east and west, width north and south, and height of 1st story, always in the same order—according to different authorities:—64½ by — by 16 feet, Nebel, plate; 69 by 61 by —, Dupaix; — by 43 by 9½, Id., plate; 58 by 69 by 11, Alzate and Humboldt; 63 by 58 by 19, Revista Mex. The side shown in Dupaix's plate as 43 feet may be the northern or southern, instead of the eastern or western, according as the stairway is on the north or west.

[IX-39] 'Pórfido granítico,' Revista Mex., p. 548. 'Basalto porfírico,' Nebel. Basalt, Löwenstern, Mex., pp. 209-10. 'La calidad de piedra de esta magnífica arquitectura es de piedra vitrificable, y por la mayor parte de aquella piedra con que forman las muelas ó piedras para moler trigo: tambien hay de color blanquecino, siendo de notar, que en muchas leguas à la redonda no se halla semejante calidad de piedra.' Alzate, p. 8.

[IX-40] Kingsborough's edition of Castañeda's drawing bears not the slightest likeness to that in the Antiq. Mex., copied above. It is possible that the latter was made up at Paris from Alzate's plate.

[IX-41] 'El primer destruidor, comparable al zapatero que quemó el templo de Diana Efesina, fué un fulano Estrada; su atrevimiento permanezca en oprobio para con los amantes de la antigüedad.' Alzate, p. 8. Humboldt, Vues, tom. i., p. 132, gives 1750 as the date when the five stories yet remained in place.

[IX-42] London Illustrated News, June 1, 1867. Alzate and Mayer also give restorations.