The modern Welsh name for fairies is y Tylwyth Teg, the fair folk or family. This is sometimes lengthened into y Tylwyth Teg yn y Coed, the fair family in the wood, or Tylwyth Teg y Mwn, the fair folk of the mine. They are seen dancing in moonlight nights on the velvety grass, clad in airy and flowing robes of blue, green, white, or scarlet--details as to colour not usually met, I think, in accounts of fairies. They are spoken of as bestowing blessings on those mortals whom they select to be thus favoured; and again are called Bendith y Mamau, or their mother's blessing, that is to say, good little children whom it is a pleasure to know. To name the fairies by a harsh epithet is to invoke their anger; to speak of them in flattering phrase is to propitiate their good offices. The student of fairy mythology perceives in this propitiatory mode of speech a fact of wide significance. It can be traced in numberless lands, and back to the beginning of human history, among the cloud-hung peaks of Central Asia. The Greeks spoke of the furies as the Eumenides, or gracious ones; Highlanders mentioned by Sir Walter Scott uncover to the gibbet and call it 'the kind gallows;' the Dayak will not name the small-pox, but calls it 'the chief;' the Laplander calls the bear 'the old man with the fur coat;' in Ammam the tiger is called 'grandfather;' and it is thought that the maxim, 'Speak only good of the dead,' came originally from the notion of propitiating the ghost of the departed,[9] who, in laying off this mortal garb, had become endowed with new powers of harming his late acquaintance.