orse to master spent and weary ones. Since you command
it I must do it, but it is sorely against my will."

Then he armed himself and took his horse, and in the joust easily
overthrew Lamorak and his weary steed. The knight lightly sprang from
the falling charger and drew his sword, boldly challenging Tristram to
meet him on foot. But this Tristram would by no means do, though Lamorak
hotly renewed the challenge.

"You are great of heart, Sir Lamorak," said Tristram, "but no knight nor
horse was ever made that could forever endure. Therefore I will not meet
you, and I am sorry for having jousted with you."

"You have done me an evil turn," said Lamorak, angrily, "for which I
shall repay you when an opportunity comes."

Lamorak soon got his revenge. For as he rode with Sir Driant towards
Camelot he met by the way a boy who had been sent by Morgan le Fay to
King Arthur. For the false enchantress still held to her hatred against
her noble brother, and by all means sought his harm. So by magic art she
had made a drinking-horn of such strange virtue that if any lady drank
of it who had been false to her husband all the wine would be spilled,
but if she had been true to him, she might drink in peace and safety.

This horn she sent to Arthur's court, hoping that Guenever might drink
thereof and be dishonored, for her love for Lancelot was known to all
but the king.

Lamorak, learning from the boy his errand, bade him bear the horn to
King Mark's court, and tell the king that it was sent to prove the
falseness of his lady, who loved Sir Tristram more than she did her
wedded lord.

Soon afterwards, therefore, the boy appeared at Tintagil Castle, and
presented King Mark the magic horn, telling him of its virtues, and all
that Sir Lamorak had bidden him say.

"By my royal faith we shall try it, then!" said the king. "Not only my
queen, but all the ladies of the court, shall drink of it, and we shall
learn who among them has other lovers than their liege lords."

Much to their unwillingness, Queen Isolde and a hundred ladies of the
court were made to drink from the magic horn, and of them all only four
drank without spilling the wine.

"Now, by my knightly honor, all these false dames shall be burnt!" cried
the king. "My court shall be purged of this vile stain."

"That shall they not," cried the barons. "We shall never consent that
the queen and all these ladies shall be destroyed for a horn wrought by
sorcery, and se