the most ancient of primitive symbols was primarily a graphic representation of the annual rotation of the Septentriones around Polaris. It thus constituted not only an image of the most impressive of celestial phenomena but also a year-symbol. The most highly-developed forms of the swastika found in Mexico are associated with calendar-signs. In Mexico and in the Ohio Valley it is linked with the serpent, to the symbolism of which reference should be made. In Copan the cross symbol is associated with the image of a figure in repose, occupying the Middle, and four puffs of breath or air, laden with life-seeds, emanating from this. Considering that the cross ultimately became the symbol of the union of the four elements or two principles of nature in one and that the production of life-producing rain was attributed to the union of heaven and earth, it is evident why the Cozumel cross was described to its Spanish discoverers, by the natives, as a symbol of the “rain-god.” THE SACRED FIRE which was kept perpetually burning on the summit of the pyramid was the graphic and appropriate image of the central light of heaven that most naturally suggested itself to the native mind. Its origin was attributed to supernatural agency and it was under the special care of the priesthood. A deeply symbolical meaning was obviously attached to the ceremonial kindling of the sacred fire by means of the reed fire-drill which was held perpendicularly and inserted into a horizontally-placed piece of dry wood. A noteworthy resemblance to a tau-shaped figure was thus formed, which is interesting in connection with the fact that the ceremony of kindling the sacred fire was undoubtedly regarded by the ancient Mexicans as emblematical of the productive and life-giving union of the dual principles of nature. The acatl or reedstalk, inserted into the vase-like symbol of the earth, such as is carved on the centre of the upper edge of the calendar-stone, is but another hieratic form of the same symbolism. The annual re-distribution of the sacred fire to the entire population, a fresh gift from heaven obtained by the mediation of the high-priest, was particularly impressive and emphasized the idea of all fire and light and life proceeding from a common centre. It is noticeable that the reed or acatl is also intimately associated with the east, the masculine or life-giving region. The Maya name for tortoise=ac, is a curious homonym of the Nahuatl word ac-atl. THE SERPENT