The moon was to Keats a power very different from what she has always been to popular astrology and tradition. Traditionally and popularly she was the governess of floods, the presiding planet of those that ply their trade by sea, river, or canal, also of wanderers and vagabonds generally: the disturber and bewilderer withal of mortal brains and faculties, sending down upon men under her sway that affliction of lunacy whose very name was derived from her. For Keats it was her transmuting and glorifying power that counted, not her pallor but her splendour, the magic alchemy exercised by her light upon the things of earth, the heightened mystery, poetry, and withal unity of aspect which she sheds upon them. He can never keep her praises long out of his early poetry, and we have seen, in '_I stood tiptoe_,' what a range of beneficent activities he attributes to her. Now, as he settles down to work on _Endymion_, we shall find her, by reason of that special glorifying and unifying magic of her light, become for him, at first perhaps instinctively and unaware, but more and more consciously as he goes on, a definite symbol of Beauty itself--what he calls in a letter 'the principle of Beauty in all things,' the principle which binds in a divine community all such otherwise unrelated matters as those we shall find him naming together as things of beauty in the exordium of his poem. Hence the tale of the loves of the Greek shepherd-prince and the moon-goddess turns under his hand into a parable of the adventures of the poetic soul striving after full communion with this spirit of essential Beauty. As to the literary associations which drew Keats to the Endymion story, there is scarce one of our Elizabethan poets but touches on it briefly or at length. Keats was no doubt acquainted with the _Endimion_ of John Lyly, an allegorical court comedy in sprightly prose which had been among the plays edited, as it happened, by one of his new Hampstead friends, Charles Dilke: but in it he could have found nothing to his purpose. Marlowe is likely to have been in his mind, with --that night-wandering, pale, and watery star, When yawning dragons draw her thirling car From Latmus' mount up to the gloomy sky, Where, crowned with blazing light and majesty, She proudly sits. So will Shakespeare have been certainly, with the call-- Peace, ho! the moon sleeps with Endymion, And would not be awaked,