Sir Thomas Malory (d. 1471). The Holy Grail. The Harvard Classics. 190914.
The Seventeenth Book
How Sir Launcelot Returned towards Logris, and of Other Adventures Which He Saw in the Way
THEN King Pelles came to Sir Launcelot and told him tidings of his brother, whereof he was sorry, that he wist not what to do. So Sir Launcelot departed, and took his arms, and said he would go see the realm of Logris, which I have not seen these twelve months. And therewith he commended the king to God, and so rode through many realms. And at the last he came to a white abbey, and there they made him that night great cheer; and on the morn he rose and heard mass. And afore an altar he found a rich tomb, the which was newly made; and then he took heed, and saw the sides written with gold which said: Here lieth King Bagdemagus of Gore, which King Arthurs nephew slew; and named him, Sir Gawaine. Then was he not a little sorry, for Launcelot loved him much more than any other, and had it been any other than Gawaine he should not have escaped from death to life; and said to himself: Ah Lord God, this is a great hurt unto King Arthurs court, the loss of such a man. And then he departed and came to the abbey where Galahad did the adventure of the tombs, and won the white shield with the red cross; and there had he great cheer all that night. And on the morn he turned unto Camelot, where he found King Arthur and the queen. But many of the knights of the Round Table were slain and destroyed, more than half. And so three were come home again, that were Sir Gawaine, Sir Ector, and Sir Lionel, and many other that need not to be rehearsed. Then all the court was passing glad of Sir Launcelot, and the king asked him many tidings of his son Galahad. And there Launcelot told the king of his adventures that had befallen him syne he departed. And also he told him of the adventures of Galahad, Percivale, and Bors, which that he knew by the letter of the dead damosel, and as Galahad had told him. Now God would, said the king, that they were all three here. That shall never be, said Launcelot, for two of them shall ye never see, but one of them shall come again.