So when Sir Galahad left the Castle of Maidens he rode till he came to a waste forest, and there he met with Sir Lancelot and Sir Percivale; but they knew him not, for he was now disguised. And they fought together, and the two knights were smitten down out of the saddle. “God be with thee, thou best Knight in the world,” cried a nun who dwelt in a hermitage close by; and she said it in a loud voice, so that Lancelot and Percivale might hear. But Sir Galahad feared that she would make known who he was, so he spurred his horse and struck deep into the forest before Sir Lancelot and Sir Percivale could mount again. They knew not which path he had taken, so Sir Percivale turned back to ask advice of the nun, and Sir Lancelot pressed forward. IV. How Sir Lancelot saw a Vision, and repented of his Sins. He halted when he came to a stone cross, which had by it a block of marble, while nigh at hand stood an old chapel. He tied his horse to a tree, and hung his shield on a branch, and looked into the chapel, for the door was waste and broken. And he saw there a fair altar covered with a silken cloth, and a candlestick which had six branches, all of shining silver. A great light streamed from it, and at this sight Sir Lancelot would fain have entered in, but he could not. So he turned back sorrowful and dismayed, and took the saddle and bridle off his horse, and let him pasture where he would, while he himself unlaced his helm, and ungirded his sword, and lay down to sleep upon his shield, at the foot of the cross.