The harp is played by Welsh fairies to an extent unknown in those parts of the world where the harp is less popular among the people. When any instrument is distinctly heard in fairy cymmoedd it is usually the harp. Sometimes it is a fiddle, but then on close examination it will be discovered that it is a captured mortal who is playing it; the Tylwyth Teg prefer the harp. They play the bugle on specially grand occasions, and there is a case or two on record where the drone of the bagpipes was heard; but it is not doubted that the player was some stray fairy from Scotland or elsewhere over the border. On the top of Craig-y-Ddinas thousands of white fairies dance to the music of many harps. In the dingle called Cwm Pergwm, in the Vale of Neath, the Tylwyth Teg make music behind the waterfall, and when they go off over the mountains the sounds of their harps are heard dying away as they recede. The story which presents the Cambrian equivalent of the Magic Flute substitutes a harp for the (to Welshmen) less familiar instrument. As told to me this story runs somewhat thus: A company of fairies which frequented Cader Idris were in the habit of going about from cottage to cottage in that part of Wales, in pursuit of information concerning the degree of benevolence possessed by the cottagers. Those who gave these fairies an ungracious welcome were subject to bad luck during the rest of their lives, but those who were good to the little folk became the recipients of their favour. Old Morgan ap Rhys sat one night in his own chimney corner making himself comfortable with his pipe and his pint of cwrw da. The good ale having melted his soul a trifle, he was in a more jolly mood than was natural to him, when there came a little rap at the door, which reached his ear dully through the smoke of his pipe and the noise of his own voice--for in his merriment Morgan was singing a roystering song, though he could not sing any better than a haw--which is Welsh for a donkey. But Morgan did not take the trouble to get up at sound of the rap; his manners were not the most refined; he thought it was quite enough for a man on hospitable purposes bent to bawl forth in ringing Welsh, 'Gwaed dyn a'i gilydd! Why don't you come in when you've got as far as the door?' The welcome was not very polite, but it was sufficient. The door opened, and three travellers entered, looking worn and weary. Now these were the fairies from Cader Idris, disguised in this manner for purposes of observation, and Morgan never suspected they were other than they appeared. 'Good sir,' said one of the travellers, 'we are worn and weary, but all we seek is a bite of food to put in our wallet, and then we will go on our way.' 'Waw, lads! is that all you want? Well, there, look you, is the loaf and the cheese, and the knife lies by them, and you may cut what you like, and fill your bellies as well as your wallet, for never shall it be said that Morgan ap Rhys denied bread and cheese to a fellow creature.' The travellers proceeded to help themselves, while Morgan continued to drink and smoke, and to sing after his fashion, which was a very rough fashion indeed. As they were about to go, the fairy travellers turned to Morgan and said, 'Since you have been so generous we will show that we are grateful. It is in our power to grant you any one wish you may have; therefore tell us what that wish may be.'