When Sir Gawain had spoken thus, King Arthur sat pensive in spirit, and mused deeply of the Holy Grail and what saintly knight should come who might achieve it.
Anon he bade them hasten to set on the banquet. "Sir," said Sir Key, the seneschal, "if we go now to meat ye will break the ancient custom of your court, for never have ye dined at this high feast till ye have seen some strange adventure."
"Thou sayest truly," said the king, "but my mind was full of wonders and musings, till I bethought me not of mine old custom."
As they stood speaking thus, a squire ran in and cried, "Lord, I bring thee marvelous tidings."
"What be they?" said King Arthur.
"Lord," said he, "hereby at the river is a marvelous great stone, which I myself saw swim down hither-wards upon the water, and in it there is set a sword, and ever the stone heaveth and swayeth on the water, but floateth down no further with the stream."
"I will go and see it," said the king. So all the knights went with him, and when they came to the river, there surely found they a mighty stone of red marble floating on the water, as the squire had said, and therein stuck a fair and rich sword, on the pommel whereof were precious stones wrought skillfully with gold into these words: "No man shall take me hence but he by whose side I should hang, and he shall be the best knight in the world."
When the king read this, he turned round to Sir Lancelot, and said, "Fair sir, this sword ought surely to be thine, for thou art the best knight in all the world."
But Lancelot answered soberly, "Certainly, sir, it is not for me; nor will I have the hardihood to set my hand upon it. For he that toucheth it and faileth to achieve it shall one day be wounded by it mortally. But I doubt not, lord, this day will show the greatest marvels that we yet have seen, for now the time is fully come, as Merlin hath forewarned us, when all the prophecies about the Sangreal shall be fulfilled."
Then stepped Sir Gawain forward and pulled at the sword, but could not move it, and after him Sir Percival, to keep him fellowship in any peril he might suffer. But no other knight durst be so hardy as to try.