The king, overcome by his enemies, receives his deadly wound, and sails away in the barge, with the three queens, to the island valley of Avilion. But, according to Malory, Sir Bedevere finds him on the morrow, lying dead in a little chapel on a rock:—
"And when Queen Guinevere understood that her lord King Arthur was slain, and all the noble knights, Sir Modred and all the remnant, she stole away, and five ladies with her, and so she went to Almesbury, and there she let make herself a nun, and wore white clothes and black, and great penance she took as ever did sinful lady in this land, and never creature could make her merry, but lived in fastings, prayers, and alms-deeds, that all manner of people marvelled how virtuously she was changed. Now leave we Queen Guinevere in Almesbury, a nun in white clothes and black, and there she was abbess and ruler as reason would, and turn me from her and speak me of Sir Lancelot du Lake."
Meanwhile, Sir Lancelot had returned to England to avenge King Arthur's death:—
"Then the people told him how that he was slain, and Sir Modred and a hundred thousand died on a day, and how Sir Modred gave King Arthur there the first battle at his landing, and there was good Sir Gawayn slain, and on the morn Sir Modred fought with the king upon Barham Down, and there the king put Sir Modred to the worse. Alas, said Sir Lancelot, this is the heaviest tidings that ever came to me. Now fair Sirs, said Sir Lancelot, shew me the tomb of Sir Gawayn. And then certain people of the town brought him into the castle of Dover and showed him the tomb. Then Sir Lancelot kneeled down and wept and prayed heartily for his soul. And that night he made a dole, and all they that would come had as much flesh, fish, wine, and ale as they would, and every man and woman had twelve pence come who would. Thus with his own hand dealt he his money in a mourning gown; and ever he wept, and prayed them to pray for the soul of Sir Gawayn. And on the morn all the priests and clerks that might be gotten in the country were there and sung Mass of Requiem. And there offered first Sir Lancelot, and he offered an hundred pound, and then the seven kings offered forty pound apiece, and also there was a thousand knights, and each of them offered a pound, and the offering dured from morn till night. And Sir Lancelot lay two nights on his tomb in prayers and in weeping. Then on the third day Sir Lancelot called the kings, dukes, earls, barons, and knights, and said thus:—
My fair lords, I thank you all of your coming into this country with me: but we come too late, and that shall repent me while I live, but against death may no man rebel. But sithen it is so, said Sir Lancelot, I will myself ride and seek my lady Queen Guinevere, for as I hear say she hath great pain and much disease, and I heard say that she is fled into the west country, therefore ye all abide me here, and but if I come not again within fifteen days, then take your ships and your fellowship, and depart into your country.
"Then came Sir Bors de Ganis, and said, My lord Sir Lancelot, what think ye for to do, now to ride in this realm? wit thou well ye shall find few friends. Be as it may, said Sir Lancelot, keep you still here, for I will forth on my journey, and no man nor child shall go with me. So it was no boot to strive, but he departed and rode westerly and sought seven or eight days, and at the last he came to a nunnery. And then was Queen Guinevere ware of Sir Lancelot as he walked in the cloister. And when she saw him there she swooned thrice, that all the ladies and gentlewomen had work enough to hold the Queen up. So when she might speak she called the ladies and gentlewomen to her and said, Ye marvel, fair ladies, why I make this cheer. Truly, she said, it is for the sight of yonder knight which yonder standeth, wherefore I pray you all call him to me. And when Sir Lancelot was brought unto her she said, through this knight and me all these wars been wrought, and the death of the most noblest knights of the world. For through our love that we have loved together is my most noble lord slain. Therefore, wit ye well, Sir Lancelot, I am set in such a plight to get my soul health; and yet I trust through God's grace after my death to have a sight of the blessed face of Christ, and at the dreadful day of doom to sit on His right side, for as sinful creatures as ever was I are saints in heaven. Therefore, Sir Lancelot, I require and beseech thee heartily, for all the love that ever was betwixt us, that thou never see me more in the visage. And furthermore I command thee on God's behalf right straightly that thou forsake my company, and to thy kingdom thou turn again, and keep well thy realm from war and wrack. For as well as I have loved thee, mine heart will not serve me to see thee; for both through me and thee is the flower of kings and knights destroyed. Therefore, Sir Lancelot, go to thy realm, and there take thee a wife, and live with her in joy and bliss, and I pray thee heartily pray for me to our Lord, that I may amend my mis-living.
"Now, sweet madam, said Sir Lancelot, would ye that I should return again unto my country, and there to wed a lady? Nay, madam, wit you well, that shall I never do: for I shall never be so false to you of that I have promised, but the same destiny that ye have taken you unto, I will take me unto, for to please God and specially to pray for you.
"If thou wilt do so, said the Queen, hold thy promise. But I may not believe but that thou wilt turn to the world again.
"Ye say well, said he, yet wish ye me never false of my promise, and God defend but that I should forsake the world like as ye have done. For in the quest of the Sancgreall I had forsaken the vanities of the world had not your lord been. And if I had done so at that time, with my heart, will, and thought, I had passed all the knights that were in the Sancgreall, except Sir Galahad, my son. And therefore, lady, sithen ye have taken you to perfection, I must needs take me unto perfection of right. For I take record of God, in you have I had mine earthly joy, and if I had found you so disposed, I had cast me for to have had you into mine own realm. But sithen I find you thus disposed, I ensure you faithfully that I will take me to penance, and pray while my life lasteth, if that I may find any hermit, either grey or white, that will receive me. Wherefore, madam, I pray you kiss me once and never more.
"Nay, said the Queen, that shall I never do, but abstain you from such works. And they departed. But there was never so hard a hearted man but he would have wept to see the dolour that they made. For there was lamentation as though they had been stung with spears, and many times they swooned. And the ladies bare the Queen to her chamber. And Sir Lancelot awoke, and went, and took his horse, and rode all that day and all that night in a forest, weeping. And at the last he was ware of an hermitage, and a chapel stood betwixt two cliffs; and then he heard a little bell ring to Mass, and thither he rode and alighted, and tied his horse to the gate, and heard Mass. So he that sang the Mass was the Bishop of Canterbury. There was also Sir Bedevere, and both the bishop and Sir Bedevere knew Sir Lancelot, and they spoke together after Mass. But when Sir Bedevere had told his tale all whole, Sir Lancelot's heart almost braste for sorrow, and Sir Lancelot threw his arms abroad and said, Alas, who may trust this world! And then he kneeled down on his knees, and prayed the bishop to shrive him and assoil him. And then he besought the bishop that he might be his brother. Then the bishop said, I will gladly, and there he put an habit upon Sir Lancelot, and there he served God day and night with prayers and fastings."