This was the adventure that Percivale had. When he had parted from his fellows and was riding alone he met a company of twenty knights. They stood across his path and asked him who he was and whence he came. "I am Sir Percivale," he answered, "and I come from the court of King Arthur."
"Then we will kill you," they cried, "for we are enemies of King Arthur and of all his knights."
Then they dropped the points of their spears and rushed upon him, and he struck down the first that came with his spear. But half a dozen of the others came upon him all at once, and some of the rest killed his horse, so that he was thrown down and was helpless among them. Then, when he thought that his last moment was surely come, he heard the sound of a horse's hoofs and then a shout, and then he saw the flash of a bright, flame-colored armor coming toward him. In an instant the knight who wore it was among them, and he had struck down some of them with his spear, and then he had drawn his sword and he was laying about him with it. No one who felt one stroke of that sword stayed to feel another. Some fell and could not rise, and others turned and fled, and soon there was none left to do any harm to Percivale. Then the knight in the flame-colored arms went away too, as fast as his horse could go, and all that Percivale saw of him was a last glimmer of his armor among the trees.
Percivale knew that this was Galahad, and he wished that he could follow him and go with him on his quest of the Holy Grail. But he had no horse and Galahad was out of sight, and he could do no more than go as fast as he could on foot the way that Galahad had gone. And so he went on, not hoping to overtake Galahad, and scarcely knowing what he did, till night came on and it grew so dark that he could not see his way, and he was so weary and so faint that he felt that he could go no farther. Then he sank down, just where he was, upon the ground, and slept.
When he awoke it was midnight. The moon was shining, and by the dim light he saw a girl standing beside him. It was she who had awakened him. "Knight," she said, "what are you doing here? Have you nothing better to do than to lie asleep beside the road? Where is your horse?"
"My horse was killed," he answered, "by some knights who fell upon me and nearly killed me too. Then I came so far without him and grew so weary that I sank down and slept here where you have found me."
"I will give you a horse," the girl said, "if you will take him from me."
"There is nothing that I need," said Percivale, "so much as a horse, and if you can find me one I shall be grateful to you."
The girl went away and soon she came back leading a great, black horse, with rich trappings, and she told Percivale to take him. The instant that Percivale was in the saddle the horse was away like the wind. Percivale could not stop him or turn him. He went where he liked, and Percivale was sure that in all his life he had never ridden so fast. No, nor a tenth part as fast, for sometimes, as this mad horse carried him along, he saw places that he knew, and within an hour he saw some that he knew were a day's journey apart. And all at once he heard a dull roar and saw the ocean before him. The horse was going straight into it, as it seemed, and when Percivale saw that, he drew his sword and held it by the blade and struck the horse's neck with the cross-shaped hilt. Then the horse gave a great leap and threw Percivale off his back. He fell on the very edge of the water and the horse plunged into it. And where he disappeared there sprang up a great flame, bright blue, and it went out and left a thick, black smoke behind it. The wind blew the smoke away, and there was nothing more to see but the great waves rolling toward the shore and dashing against the rocks.
Then the weariness and faintness came upon Percivale once more, and he lay down there on the rough rocks of the sea-shore and slept again. It was morning when he awoke. As he looked around him he saw that the rocks about him were so high that they made a mountain and the water seemed to be all around it, or nearly so. And as he was looking for a way to get back to the mainland he saw coming toward him a great serpent, carrying a young lion in its mouth. An old lion was following, and it came up and began to fight with the serpent, but it could not make it drop the young lion. Then Percivale thought that of the two beasts he liked the lion better, and that he would try to help it. So he drew his sword and put his shield before him and ran to the serpent and cut off its head.