When Arthur was crowned he plucked the nine gems out of the crown he had found on the skeleton and showed them to his knights with the words:
"These jewels belong to the whole kingdom for everybody's use and not to the king. Hereafter there is to be joust for one of them every year and in that way in nine years time we will learn who is the mightiest in the kingdom and we will race with each other to become skilful in the use of arms until at last we shall be able to drive away the heathen horde from the land."
Eight years had now passed and there had been eight jousts. Lancelot had won the diamond every year and intended when he had been victorious in all the jousts, to give the nine gems to the queen. When the ninth year came Arthur proclaimed the tournament for the central and largest diamond to be held at Camelot, where he was holding his court. But the queen became ill as the time for the tour jousts drew near and he asked her whether she was too feeble to go to see Lancelot in the lists.
"Yes, my lord," replied Guinevere, "and you know it," and she looked up languidly to Lancelot who stood near.
Lancelot thinking that she would rather have him near while she was ill than to receive all the diamonds of the crown, said:
"Sir King, that old wound of mine is not quite healed so I can hardly ride in my saddle."
So the king went, excused Lancelot, and rode away alone to the lists while Lancelot remained, but as soon as Arthur was gone the queen told Lancelot that he ought by all means go too and fight.
"But how can I go now," replied Lancelot, "after what I have said to the king."
"I will tell you what to do," said Guinevere. "Everybody says that men go down before your spear just because of your great name. They are afraid as soon as you appear and of course, they are conquered. Go in today entirely unknown and win for yourself, then after all is over the king will be pleased with you for being so clever."