Once a good old man told her what was meant by the Holy Grail.
"Grail," he said, "is the word for the cup out of which our Lord Jesus drank, the night that he held the last supper with his disciples. Therefore, it is called holy. There is a tradition which says that for a long time after the death of Christ the Holy Grail remained on earth, and any one who was sick and touched it was healed at once. But then people grew to be so wicked that it disappeared from earth. It is said that if a person in our day were only good enough, he could see the Holy Grail."
"Really see it?" asked the maiden, eagerly, "or see it in a vision?"
"I do not know," answered the good old man, "but either one would be a great happiness. For a real sight of it, or a vision, would show the person who saw it that he was sinless."
Then the beautiful maiden prayed more than ever. She became so thin and pale that it seemed as if she were almost transparent, and at last she lay dying. One morning she sent for her brother, Sir Perceval, and for his friend, Sir Galahad.
Sir Perceval and Sir Galahad were the two best knights in Arthur's Court. They were not so powerful as Sir Lancelot or Sir Geraint or Sir Gareth, but they had purer souls than these. When they came to the bedside of the maiden, she said:
"Oh, my brother and my friend, I have seen the Holy Grail. Last night I was awakened by a sound like the music of a silver horn across the hills. It was more beautiful music than any I have ever heard. Then through my window shone a long cold beam of silver light, and slowly across that beam came the Holy Grail. It was red like a beautiful rose, and the light reflected from it covered all the walls with a rosy color. And then it vanished. Now I beg you to seek it; and go to the hall of Arthur and tell all the other knights to take the quest. If they can but see the Grail, it will be a sign that they are good, and that the world is growing better."
As she spoke, Sir Galahad's face wore an expression so like her own that Sir Perceval was amazed. But the maiden took from the side of her bed a sword-belt, and gave it to Sir Galahad.
"Fair knight," she said, "I have made this golden belt of my hair, and woven on it, in crimson and silver thread, the device of the Holy Grail. Put on this belt, bind your sword to it, and go forth; for you, too, shall see the Holy Grail."
Then Sir Galahad and Sir Perceval went away quietly, for they saw that the beautiful maiden had not long to live. That night they went to Arthur's hall. The king was absent with the queen, but most of the knights of the Round Table were there, and to them Sir Galahad and Sir Perceval told the vision that Sir Perceval's sister had seen.