Anon a damsel met him as he rode, and told him of a knight adventurous who did great harm thereby, and prayed him for his help.  But as he went with her he met Sir Gawain, who knew the damsel for a maiden of Queen Morgan le Fay.  Knowing, therefore, that she needs must have evil plots against Sir Tristram, Sir Gawain demanded of him courteously whither he went.

“I know not whither,” said he, “save as this damsel leadeth me.”

“Sir,” said Sir Gawain, “ye shall not ride with her, for she and her lady never yet did good to any;” and, drawing his sword, he said to the damsel, “Tell me now straightway for what cause thou leadest this knight or else shalt thou die; for I know of old thy lady’s treason.”

“Mercy, Sir Gawain,” cried the damsel, “and I will tell thee all.”  Then she told him that Queen Morgan had ordained thirty fair damsels to seek out Sir Lancelot and Sir Tristram, and by their wiles persuade them to her castle, where she had thirty knights in wait to slay them.

“Oh shame!” cried Sir Gawain, “that ever such foul treason should be wrought by a queen, and a king’s sister.”  Then said he to Sir Tristram, “Sir knight, if ye will stand with me, we will together prove the malice of these thirty knights.”

“I will not fail you,” answered he, “for but few days since I had to do with thirty knights of that same queen, and trust we may win honour as lightly now as then.”

So they rode together, and when they came to the castle, Sir Gawain cried aloud, “Queen Morgan le Fay, send out thy knights that we may fight with them.”

Then the queen urged her knights to issue forth, but they durst not, for they well knew Sir Tristram, and feared him greatly.

So Sir Tristram and Sir Gawain went on their way, and as they rode they saw a knight, named Sir Brewse-without-pity, chasing a lady, with intent to slay her.  Then Sir Gawain prayed Sir Tristram to hold still and let him assail that knight.  So he rode up between Sir Brewse and the lady, and cried, “False knight, turn thee to me and leave that lady.”  Then Sir Brewse turned and set his spear in rest, and rushed against Sir Gawain and overthrew him, and rode his horse upon him as he lay, which when Sir Tristram saw, he cried, “Forbear that villainy,” and galloped at him.  But when Sir Brewse saw by the shield it was Sir Tristram, he turned and fled.  And though Sir Tristram followed swiftly after him, yet he was so well horsed that he escaped.

Anon Sir Tristram and Sir Gawain came nigh the Maiden’s Castle, and there an old knight named Sir Pellonnes gave them lodging.  And Sir Persides, the son of Sir Pellonnes, a good knight, came out to welcome them.  And, as they stood talking at a bay window of the castle, they saw a goodly knight ride by on a black horse, and carrying a black shield.  “What knight is that?” asked Tristram.

“One of the best knights in all the world,” said Sir Persides.