In the revels of "May Day," "Midsummer," "Eogation Week," "Whitsuntide," "All Fools' Day," "New Year's Day," "Hallow E'en," "Christmas," "Easter," etc., children throughout England and in many parts of Europe during the Middle Ages took a prominent part and _rôle_ in the customs and practices which survive even to-day, as may be seen in Brand, Grimm, and other books dealing with popular customs and festivals, social _fêtes_ and merry-makings. In _Tennyson's May_ Queen we read:-- "You must wake and call me early, call me early, mother dear; To-morrow'll be the happiest time of all the glad New Year; Of all the glad New Year, mother, the maddest, merriest day; For I'm to be Queen o' the May, mother, I'm to be Queen o' the May." And a "mad, merry day" it certainly was in "merry England," when the fairest lass in the village was chosen "Queen of the May," and sang merry songs of Robin Hood and Maid Marian. Polydore Virgil tells us that in ancient Home the "youths used to go into the fields and spend the Calends of May in dancing and singing in honour of Flora, goddess of fruits and flowers." Westermarck seems to think some of these popular customs have something to do with the increase of the sexual function in spring and early summer (166. 30). In seizing upon this instinct for society-making among children and youth lies one of the greatest opportunities for the prevention of crime and immorality the world has ever known. To turn to good ends this spontaneity of action, to divert into channels of usefulness these currents of child-activity, will be to add immensely to the equipment of mankind in the struggle with vice. A certain bishop of the early Christian Church is credited with having declared that, if the authorities only took charge of the children soon enough, there would be no burning of heretics, no scandalous schisms in the body ecclesiastic; and there is a good deal of truth in this observation.