In the first place, the arguments of Dr. Edward Westermarck have satisfied me that the solar theory of the European fire-festivals, which I accepted from W. Mannhardt, is very slightly, if at all, supported by the evidence and is probably erroneous. The true explanation of the festivals I now believe to be the one advocated by Dr. Westermarck himself, namely that they are purificatory in intention, the fire being designed not, as I formerly held, to reinforce the sun's light and heat by sympathetic magic, but merely to burn or repel the noxious things, whether conceived as material or spiritual, which threaten the life of man, of animals, and of plants. This aspect of the fire-festivals had not wholly escaped me in former editions; I pointed it out explicitly, but, biassed perhaps by the great authority of Mannhardt, I treated it as secondary and subordinate instead of primary and dominant. Out of deference to Mannhardt, for whose work I entertain the highest respect, and because the evidence for the purificatory theory of the fires is perhaps not quite conclusive, I have in this edition repeated and even reinforced the arguments for the solar theory of the festivals, so that the reader may see for himself what can be said on both sides of the question and may draw his own conclusion; but for my part I cannot but think that the arguments for the purificatory theory far outweigh the arguments for the solar theory. Dr. Westermarck based his criticisms largely on his own observations of the Mohammedan fire-festivals of Morocco, which present a remarkable resemblance to those of Christian Europe, though there seems no reason to assume that herein Africa has borrowed from Europe or Europe from Africa. So far as Europe is concerned, the evidence tends strongly to shew that the grand evil which the festivals aimed at combating was witchcraft, and that they were conceived to attain their end by actually burning the witches, whether visible or invisible, in the flames. If that was so, the wide prevalence and the immense popularity of the fire-festivals provides us with a measure for estimating the extent of the hold which the belief in witchcraft had on the European mind before the rise of Christianity or rather of rationalism; for Christianity, both Catholic and Protestant, accepted the old belief and enforced it in the old way by the faggot and the stake. It was not until human reason at last awoke after the long slumber of the Middle Ages that this dreadful obsession gradually passed away like a dark cloud from the intellectual horizon of Europe.