Whatever that knowledge may have been, and their esoteric explanation of the cause of the mystification of number seven, can only be surmised to-day; but it is not improbable that it was to be found in some event in the early history of the race whose traditions we find scattered broadcast over the Earth. We have seen that the family of king _Can_ was composed of _seven members_, who became rulers of the _seven_ cities that bear their names, the ruins of which still exist in the forests of Yucatan, and by the beauty and richness of the ornamentation, the massiveness and finish of the walls of their temples and palaces, excite the admiration of the beholder. These personages, deified after their death, have been worshiped in various countries, and are yet in some, under different names. May not the remembrance of the existence of these _seven_ ancient rulers of Mayax, have been the origin of the tradition of the _seven_ divine rulers of Egypt; of the _seven Manous_ that according to the Brahmins, governed the world in the night of times; of the _seven Richis_ or holy personages who assisted them; of the _seven princes_ of the Persian court; and the _seven councillors_ of the king; of the _seven Ameshaspants_ or first angels; of the _seven great gods_ of the Assyrians; or the _seven primitive gods_ regarded by the Japanese as their ancestors and said by them to have governed the world during an incalculable number of years; of the _seven Cabiri_, worshiped by the Pelasgians at Lemnos and Samothracia; the _seven_ great gods in theogony of the Nahuatls? Do we not see a simile of the _Ah Ac chapat_ or _seven-headed_ serpent of the Mayas, totem of their _seven primitive Rulers_, that is of the _seven members_ of king _Can's_ family, in the _seven-headed heavenly Serpent_ on which rests Vishnu, the Indian creator, that corresponds to the Egyptian _Kneph_ or the _Mehen_ (_Canhel_) of the Mayas; or in the _seven_ serpents that form the crown of _Siva_; or again in the _Seven-rayed god Heptaktis_, of which the emperor Julian was so reluctant to speak?