The Vernal Equinox has all over the ancient world, and from the earliest times, been a period of rejoicing and of festivals in honor of the Sungod. It is needless to labor a point which is so well known. Everyone understands and appreciates the joy of finding that the long darkness is giving way, that the Sun is growing in strength, and that the days are winning a victory over the nights. The birds and flowers reappear, and the promise of Spring is in the air. But it may be worth while to give an elementary explanation of the ASTRONOMICAL meaning of this period, because this is not always understood, and yet it is very important in its bearing on the rites and creeds of the early religions. The priests who were, as I have said, the early students and inquirers, had worked out this astronomical side, and in that way were able to fix dates and to frame for the benefit of the populace myths and legends, which were in a certain sense explanations of the order of Nature, and a kind of "popular science." The Equator, as everyone knows, is an imaginary line or circle girdling the Earth half-way between the North and South poles. If you imagine a transparent Earth with a light at its very centre, and also imagine the SHADOW of this equatorial line to be thrown on the vast concave of the Sky, this shadow would in astronomical parlance coincide with the Equator of the Sky--forming an imaginary circle half-way between the North and South celestial poles. The Equator, then, may be pictured as cutting across the sky either by day or by night, and always at the same elevation--that is, as seen from any one place. But the Ecliptic (the other important great circle of the heavens) can only be thought of as a line traversing the constellations as they are seen at NIGHT. It is in fact the Sun's path among the fixed stars. For (really owing to the Earth's motion in its orbit) the Sun appears to move round the heavens once a year--travelling, always to the left, from constellation to constellation. The exact path of the sun is called the Ecliptic; and the band of sky on either side of the Ecliptic which may be supposed to include the said constellations is called the Zodiac. How then--it will of course be asked--seeing that the Sun and the Stars can never be seen together--were the Priests ABLE to map out the path of the former among the latter? Into that question we need not go. Sufficient to say that they succeeded; and their success--even with the very primitive instruments they had--shows that their astronomical knowledge and acuteness of reasoning were of no mean order.