§ 5.—Tree-worship in antiquity. Such then are some of the ways in which the tree-spirit or the spirit of vegetation is represented in the customs of our European peasantry. From the remarkable persistence and similarity of such customs all over Europe we are justified in concluding that tree-worship was once an important element in the religion of the Aryan race in Europe, and that the rites and ceremonies of the worship were marked by great uniformity everywhere, and did not substantially differ from those which are still or were till lately observed by our peasants at their spring and midsummer festivals. For these rites bear internal marks of great antiquity, and this internal evidence is confirmed by the resemblance which the rites bear to those of rude peoples elsewhere.(340) Therefore it is hardly rash to infer, from this consensus of popular customs, that the Greeks and Romans, like the other Aryan peoples of Europe, once practised forms of tree-worship similar to those which are still kept up by our peasantry. In the palmy days of ancient civilisation, no doubt, the worship had sunk to the level of vulgar superstition and rustic merrymaking, as it has done among ourselves. We need not therefore be surprised that the traces of such popular rites are few and slight in ancient literature. They are not less so in the polite literature of modern Europe; and the negative argument cannot be allowed to go for more in the one case than in the other. Enough, however, of positive evidence remains to confirm the presumption drawn from analogy. Much of this evidence has been collected and analysed with his usual learning and judgment by W. Mannhardt.(341) Here I shall content myself with citing certain Greek festivals which seem to be the classical equivalents of an English May Day in the olden time.