Sir Launcelot returns to court. It is noticed that the back of the "siege (seat) perilous," at the Round Table has a new inscription saying that this day this long unfilled seat should be filled. Before sitting down to feast on this day, it was an old custom to see "some adventure." Book XIII. Chapter 2. So as they stood speaking, in came a squire, and said unto the king, Sir, I bring unto you marvellous tidings. What be they? said the king. Sir, there is here beneath at the river a great stone, which I saw fleet above the water, and therein saw I sticking a sword. The king said, I will see that marvel. So all the knights went with him, and when they came unto the river, they found there a stone fleeting, as it were of red marble, and therein stack a fair and a rich sword, and in the pomell thereof were precious stones, wrought with subtil letters of gold. Then the barons read the letters, which said in this wise: Never shall man take me hence but only he by whose side I ought to hang, and he shall be the best knight of the world. When the king had seen these letters, he said unto Sir Launcelot, Fair sir, this sword ought to be yours, for I am sure ye be the best knight of the world. Then Sir Launcelot answered full soberly: Certes, sir, it is not my sword: also, sir, wit ye well I have no hardiness to set my hand to, for it longed not to hang by my side. Also who that assayeth to take that sword, and falleth of it, he shall receive a wound by that sword, that he shall not be whole long after. And I will that ye wit that this same day will the adventures of the Sancgreal, that is called the holy vessel, begin. Sir Gawaine tries to draw out the sword but fails. They sit at table and an old man brings in the young knight, Sir Galahad. Book XIII. Chapter 4. Then the old man made the young man to unarm him; and he was in a coat of red sendel, and bare a mantle upon his shoulder that was furred with ermine, and put that upon him. And the old knight said unto the young knight, Sir, follow me. And anon he led him unto the siege perilous, where beside sat Sir Launcelot, and the good man lift up the cloth, and found there letters that said thus: This is the siege of Galahad the haut prince. Sir, said the old knight, wit ye well that place is yours. And then he set him down surely in that siege . . . . . . . . . Then all the knights of the Table Round marvelled them greatly of Sir Galahad, that he durst sit there in that siege perilous, and was so tender of age, and wist not from whence he came, but all only by God, and said, This is he by whom the Sancgreal shall be achieved, for there sat never none but he, but he were mischieved. King Arthur showed the stone with the sword in it to Sir Galahad. He lightly drew out the sword and put it in his sheath. Then the king had all his knights come together to joust ere they departed. Book XIII. Chapter 6.