of Mars on which the ceremony took place lay beside the Tiber, and formed part of the king's domain down to the abolition of the monarchy. For tradition ran that at the time when the last of the kings was driven from Rome, the corn stood ripe for the sickle on the crown lands beside the river; but no one would eat the accursed grain and it was flung into the river in such heaps that, the water being low with the summer heat, it formed the nucleus of an island. The horse sacrifice was thus an old autumn custom observed upon the king's corn-fields at the end of the harvest. The tail and blood of the horse, as the chief parts of the corn-spirit's representative, were taken to the king's house and kept there; just as in Germany the harvest-cock is nailed on the gable or over the door of the farmhouse; and as the last sheaf, in the form of the Maiden, is carried home and kept over the fireplace in the Highlands of Scotland. Thus the blessing of the corn-spirit was brought to the king's house and hearth and, through them, to the community of which he was the head. Similarly in the spring and autumn customs of Northern Europe the May-pole is sometimes set up in front of the house of the mayor or burgomaster, and the last sheaf at harvest is brought to him as the head of the village. But while the tail and blood fell to the king, the neighbouring village of the Subura, which no doubt once had a similar ceremony of its own, was gratified by being allowed to compete for the prize of the horse's head. The Mamilian tower, to which the Suburans nailed the horse's head when they succeeded in carrying it off, appears to have been a peel-tower or keep of the old Mamilian family, the magnates of the village. The ceremony thus performed on the king's fields and at his house on behalf of the whole town and of the neighbouring village presupposes a time when each township performed a similar ceremony on its own fields. In the rural districts of Latium the villages may have continued to observe the custom, each on its own land, long after the Roman hamlets had merged their separate harvest-homes in the common celebration on the king's lands. There is no intrinsic improbability in the supposition that the sacred grove of Aricia, like the Field of Mars at Rome, may have been the scene of a common harvest celebration, at which a horse was sacrificed with the same rude rites on behalf of the neighbouring villages. The horse would represent the fructifying spirit both of the tree and of the corn, for the two ideas melt into each other, as we see in customs like the Harvest-May.
== 1. The Sacrament of First-Fruits ==
We have now seen that the corn-spirit is represented sometimes in human, sometimes in animal form, and that in both cases he is killed in the person of his representative
