(M34) We have still to ask, What is the meaning of such sacrifices? Why were men and animals burnt to death at these festivals? If we are right in interpreting the modern European fire-festivals as attempts to break the power of witchcraft by burning or banning the witches and warlocks, it seems to follow that we must explain the human sacrifices of the Celts in the same manner; that is, we must suppose that the men whom the Druids burnt in wicker-work images were condemned to death on the ground that they were witches or wizards, and that the mode of execution by fire was chosen because, as we have seen, burning alive is deemed the surest mode of getting rid of these noxious and dangerous beings. The same explanation would apply to the cattle and wild animals of many kinds which the Celts burned along with the men.(107) They, too, we may conjecture, were supposed to be either under the spell of witchcraft or actually to be the witches and wizards, who had transformed themselves into animals for the purpose of prosecuting their infernal plots against the welfare of their fellow creatures. This conjecture is confirmed by the observation that the victims most commonly burned in modern bonfires have been cats, and that cats are precisely the animals into which, with the possible exception of hares, witches were most usually supposed to transform themselves. Again, we have seen that serpents and foxes used sometimes to be burnt in the midsummer fires;(108) and Welsh and German witches are reported to have assumed the form both of foxes and serpents.(109) In short, when we remember the great variety of animals whose forms witches can assume at pleasure,(110) it seems easy on this hypothesis to account for the variety of living creatures that have been burnt at festivals both in ancient Gaul and modern Europe; all these victims, we may surmise, were doomed to the flames, not because they were animals, but because they were believed to be witches who had taken the shape of animals for their nefarious purposes. One advantage of explaining the ancient Celtic sacrifices in this way is that it introduces, as it were, a harmony and consistency into the treatment which Europe has meted out to witches from the earliest times down to about two centuries ago, when the growing influence of rationalism discredited the belief in witchcraft and put a stop to the custom of burning witches. On this view the Christian Church in its dealings with the black art merely carried out the traditional policy of Druidism, and it might be a nice question to decide which of the two, in pursuance of that policy, exterminated the larger number of innocent men and women.(111) Be that as it may, we can now perhaps understand why the Druids believed that the more persons they sentenced to death, the greater would be the fertility of the land.(112) To a modern reader the connexion at first sight may not be obvious between the activity of the hangman and