Arthur Machen said this quote
“ He remembered an old tale which his father was fond of telling him—the story of Eos Amherawdur (the Emperor Nightingale). Very long ago, the story began, the greatest and the finest court in all the realms of faery was the court of the Emperor Eos, who was above all the kings of the Tylwydd Têg, as the Emperor of Rome is head over all the kings of the earth. So that even Gwyn ap Nudd, whom they now call lord over all the fair folk of the Isle of Britain, was but the man of Eos, and no splendour such as his was ever seen in all the regions of enchantment and faery. Eos had his court in a vast forest, called Wentwood, in the deepest depths of the green-wood between Caerwent and Caermaen, which is also called the City of the Legions; though some men say that we should rather name it the city of the Waterfloods. Here, then, was the Palace of Eos, built of the finest stones after the Roman manner, and within it were the most glorious chambers that eye has ever seen, and there was no end to the number of them, for they could not be counted. For the stones of the palace being immortal, they were at the pleasure of the Emperor. If he had willed, all the hosts of the world could stand in his greatest hall, and, if he had willed, not so much as an ant could enter into it, since it could not be discerned. But on common days they spread the Emperor's banquet in nine great halls, each nine times larger than any that are in the lands of the men of Normandi. And Sir Caw was the seneschal who marshalled the feast; and if you would count those under his command—go, count the drops of water that are in the Uske River. But if you would learn the splendour of this castle it is an easy matter, for Eos hung the walls of it with Dawn and Sunset. He lit it with the sun and moon. There was a well in it called Ocean. And nine churches of twisted boughs were set apart in which Eos might hear Mass; and when his clerks sang before him all the jewels rose shining out of the earth, and all the stars bent shining down from heaven, so enchanting was the melody. Then was great bliss in all the regions of the fair folk. But Eos was grieved because mortal ears could not hear nor comprehend the enchantment of their song. What, then, did he do? Nothing less than this. He divested himself of all his glories and of his kingdom, and transformed himself into the shape of a little brown bird, and went flying about the woods, desirous of teaching men the sweetness of the faery melody. And all the other birds said: This is a contemptible stranger. The eagle found him not even worthy to be a prey; the raven and the magpie called him simpleton; the pheasant asked where he had got that ugly livery; the lark wondered why he hid himself in the darkness of the wood; the peacock would not suffer his name to be uttered. In short never was anyone so despised as was Eos by all the chorus of the birds. But wise men heard that song from the faery regions and listened all night beneath the bough, and these were the first who were bards in the Isle of Britain. ”