One day Sir Lancelot called his nephew Sir Lionel, and told him to mount his horse, for they must go to seek adventures. Sir Lionel was very glad, for it was a great honor to be chosen as a companion by Sir Lancelot. They rode off through a deep forest, and then across a wide, treeless plain. The sun was shining hot and bright, and when they reached a clump of trees, Sir Lancelot bade Sir Lionel dismount. Then the two sat in the shade to rest.
It was not long before Sir Lancelot fell asleep. While Sir Lionel kept guard, he saw three knights furiously pursued by another knight, who was very large. This knight overtook the three knights, one after another, and overthrew them, and bound them by the reins of their bridles. Sir Lionel, who was young and self-confident, thought that he would like to fight with this knight. So he mounted his horse very quietly without waking his uncle, and rode into the plain.
When the big knight saw him coming, he laughed and rode up quickly. At the very first stroke, young Sir Lionel fell to the earth. The strong knight bound him fast to the other three knights and drove them all to his castle. There he took off their armor and clothes, and beat them with thorny sticks. After that he threw them into a deep dungeon where there were many other knights.
Meanwhile Sir Hector, the foster father of King Arthur, hearing that Sir Lancelot and Sir Lionel had gone in search of adventures, determined to join them; so he rode hastily in pursuit. When he had gone some distance through the forest, he met a wood-cutter, and asked him if he had seen Sir Lancelot and Sir Lionel. The man replied that he had not.
"Then do you know of any adventure which I can seek?" asked Sir Hector.
The man answered:
"Sir, a mile from here is a strong castle. On one side of it is a large stream, and by that stream a large tree. At the foot of the tree is a basin of copper. Go and strike on that three times with your spear and you will meet with an adventure."
"Thank you heartily," said Sir Hector.
He rode on and soon came to the tree. Hanging on it were a great many shields, and among them Sir Lionel's. There were also shields which belonged to other knights of the Round Table. Sir Hector knew that the knights must be prisoners, and he grew very angry.
He struck sharply on the copper basin, and at once a huge knight appeared.