The Number Concept: Its Origin and Development

by Levi L. Conant

[³⁶⁸]Pott, Zählmethode, p. 89. The Totonacos were the first race Cortez encountered after landing in Mexico.

[³⁶⁹]Op. cit., p. 90. The Coras are of the Mexican state of Sonora.

[³⁷⁰]Gallatin, Semi-Civilized Nations, p. 114.

[³⁷¹]Humboldt, Recherches, Vol. II. p. 112.

[³⁷²]Squier, Nicaragua, Vol. II. p. 326.

[³⁷³]Gallatin, Semi-Civilized Nations, p. 57.