[Sidenote: May-tree or May-bush a protection against witchcraft.] However in these and similar European customs it seems that the influence of the tree, bush, or bough is really protective rather than generative; it does not so much fill the udders of the cows as prevent them from being drained dry by witches, who ride on broomsticks or pitchforks through the air on the Eve of May Day (the famous Walpurgis Night) and make great efforts to steal the milk from the cattle. Hence the many precautions which the prudent herdsman must take to guard his beasts at this season from the raids of these baleful creatures. For example, on May morning the Irish scatter primroses on the threshold, keep a piece of red-hot iron on the hearth, or twine branches of whitethorn and mountain-ash or rowan about the door. To save the milk they cut and peel boughs of mountain-ash (rowan), and bind the twigs round the milk-pails and the churn.[214] According to a writer of the sixteenth century, whose description is quoted by Camden, the Irish “account every woman who fetches fire on May-day a witch, nor will they give it to any but sick persons, and that with an imprecation, believing she will steal all the butter the next summer. On May day they kill all the hares they find among their cattle, supposing them the old women who have designs on the butter. They imagine the butter so stolen may be recovered if they take some of the thatch hanging over the door and burn it.”[215] In the north-east of Scotland pieces of rowan-tree and woodbine, or of rowan alone, used to be placed over the doors of the cow-houses on May Day to keep the witches from the kine; and a still better way of attaining the same object was to tie a cross of rowan-tree wood with a scarlet thread to each animal’s tail.[216] The Highlanders of Scotland believe that on Beltane eve, that is the night before May Day, the witches go about in the shape of hares and suck the milk from the cows. To guard against their depredations tar was put behind the ears of the cattle and at the root of the tail, and the house was hung with rowan-tree.[217] For the same reason the Highlanders say that the peg of the cow-shackle and the handle and cross of the churn-staff should always be made of rowan, because that is the most potent charm against witchcraft.[218] In the Isle of Man on May Day, old style, people carried crosses of rowan in their hats and fastened May-flowers over their doors as a protection against elves and witches, and for the same purpose they tied crosses of rowan to the tails of the cattle. Also women washed their faces in the dew early on May morning in order to secure good luck, a fine complexion, and immunity from witches. Further, the break of day on that morning was the signal for setting the ling or gorse on fire, which was done for the sake of burning out the witches, who are wont to take the shape of hares. In some places, indeed, as in