Note 182 — Chapter IV · MEXICAN HIEROGLYPHICS—MANUSCRIPTS—ARITHMETIC—CHRONOLOGY—ASTRONOMY

Sahagun intimates doubts of this. “They celebrated another feast every four years in honor of the elements of fire, and it is probable and has been conjectured that it was on these occasions that they made their intercalation, counting six days of nemontemi,” as the unlucky complementary days were called. (Hist. de Nueva-España, lib. 4, Apend.) But this author, however good an authority for the superstitions, is an indifferent one for the science of the Mexicans.