Once upon a time there was a Princess. Now, this Princess dwelt in a far-off and beautiful world beyond the sunset, and she had immortal youth and an ancestry of glorious name. Very rich, too, she was, and the palace in which she lived was made all of marble and alabaster and things precious and wonderful. But that which was most wonderful about her was her exceeding beauty,--a beauty not like that one sees in the world this side of the sunset. For the beauty of the Princess was the bright-shining of a lovely spirit; her body was but the veil of her soul that shone through all her perfect form as the radiance of the sun shines through clear water. I cannot tell you how beautiful this Princess was, nor can I describe the color of her hair and her eyes, or the aspect of her face. Many men have seen her and tried to give an account of her; but though I have read several of these accounts, they differ so greatly from one another that I should find it hard indeed to reproduce her picture from the records of it which her lovers have left.For all these men who have written about the Princess loved her; none, indeed, could help it who ever looked on her face. And to some she has seemed fair as the dawn, and to others dark as night; some have found her gay and joyous as Allegro, and others sad and silent and sweet as Penseroso. But to every lover she has seemed the essence and core of all beauty; the purest, noblest, highest, and most regal being that he has found it possible to conceive. I am not going to tell you about all the lovers of the Princess, for that would take many volumes to rehearse, but only about three of them, because these three were typical personages, and had very remarkable histories.Like all the lovers of the Princess, these three men were travelers, coming from a distant country to the land beyond the sunset on purpose to see the beautiful lady of whom their fathers and grandfathers had told them; the lady who never could outlive youth because she belonged to the race of the everlasting Gods who ruled the earth in the old far-off Hellenic times.I do not know how long these three men stayed in the country of the Princess; but they stayed quite long enough to be very, very much in love with her, and when at last they had to come away--for no man who is not "dead" can remain long beyond the sunset--she gave to each of them a beautiful little bird, a tiny living bird with a voice of sweetest music, that had been trained and tuned to song by Phoebus Apollo himself. And I could no more describe to you the sweetness of that song than I could describe the beauty of the Princess.Then she told the travelers to be of brave heart and of valiant hope, because there lay before them an ordeal demanding all their prowess, and after that the prospect of a great reward. "Now," she said, "that you have learned to love me, and to desire to have your dwelling here with me, you must go forth to prove your knighthood. I am not inaccessible, but no man must think to win me for his lady unless he first justify his fealty by noble service. The world to which you now go is a world of mirage and of phantasms, which appear real only to those who have never reached and seen this realm of mine on the heavenward side of the sun. You will have to pass through ways beset by monstrous spectres, over wastes where rage ferocious hydras, chimeras, and strange dragons breathing flame. You must journey past beautiful shadowy islets of the summer sea, in whose fertile bays the cunning sirens sing; you must brave the mountain robber, the goblins of the wilderness, and the ogre whose joy is to devour living men. But fear nothing, for all these are but phantoms; nor do you need any sword or spear to slay them, but only a loyal mind and an unswerving purpose. Let not your vision be deceived, nor your heart beguiled; return to me unscathed through all these many snares, and doubt not the worth and greatness of the guerdon I shall give. Nor think you go unaided. With each of you I send a guide and monitor; heed well his voice and follow where he leads."