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368 analogies there is one which is worthy of attention—it is the use of the vague year of three hundred and sixty-five days, composed of equal months, and of five complementary days, equally employed at Thebes and Mexico—a distance of three thousand leagues.… In reality, the intercalation of the Mexicans being thirteen days on each cycle of fifty-two years, comes to the same thing as that of the Julian calendar, which is one day in four years; and consequently supposes the duration of the year to be three hundred and sixty-five days six hours. Now such was the length of the year among the Egyptians—they intercalated an entire year of three hundred and seventy-five days every one thousand four hundred and sixty years.… The fact of the intercalation (by the Mexicans) of thirteen days every cycle—that is, the use of a year of three hundred and sixty-five days and a quarter—is a proof that it was borrowed from the Egyptians, or that they had a common origin." ("Antiquities of America," pp. 52, 53.)

The Mexican century began on the 26th of February, and the 26th of February was celebrated from the time of Nabonassor, 747 B.C., because the Egyptian priests, conformably to their astronomical observations, had fixed the beginning of the month Toth, and the commencement of their year, at noon on that day. The five intercalated days to make up the three hundred and sixty-five days were called by the Mexicans Nemontemi, or useless, and on them they transacted no business; while the Egyptians, during that epoch, celebrated the festival of the birth of their gods, as attested by Plutarch and others.

It will be conceded that a considerable degree of astronomical knowledge must have been necessary to reach the conclusion that the true year consisted of three hundred and sixty-five days and six hours (modern science has demonstrated that it consists of three hundred and sixty-five days and five hours, less ten seconds); and a high degree of civilization was requisite to insist that the year must be brought around, by the intercalation of a certain number of days in a certain period of time, to its true relation to the seasons. Both were the outgrowth of a vast, ancient civilization of the highest order,