There was in the country of Yunaun or Greece, a king who was
leprous, and his physicians had in vain endeavoured his cure;
when a very able physician, named Douban, arrived at his court.

This physician had learnt the theory of his profession in Greek,
Persian, Turkish, Arabic, Latin, Syriac, and Hebrew books; he was
an experienced natural philosopher, and fully understood the good
and bad qualities of plants and drugs. As soon as he was informed
of the king's distemper, and understood that his physicians had
given him over, he found means to present himself before him. "I
know," said he, after the usual ceremonials, "that your majesty's
physicians have not been able to heal you of the leprosy; but if
you will accept my service, I will engage to cure you without
potions, or external applications."

The king listened to what he said, and answered, "If you be able
to perform what you promise, I will enrich you and your
posterity. Do you assure me that you will cure my leprosy without
potion, or applying any external medicine?" "Yes, Sire," replied
the physician, "I promise myself success, through God's
assistance, and to-morrow, with your majesty's permission, I will
make the trial."

The physician returned to his quarters, made a hollow mace, and
at the handle he put in his drugs; he made also a ball in such a
manner as suited his purpose, with which next morning he
presented himself before the king, and falling down at his feet,
kissed the ground.

The physician Douban rose up, and after a profound reverence,
said to the king, he judged it meet that his majesty should take
horse, and go to the place where he used to play at mall. The
king did so, and when he arrived there, the physician came to him
with the mace, and said, "Exercise yourself with this mace, and
strike the ball until you find your hands and body perspire. When
the medicine I have put up in the handle of the mace is heated
with your hand, it will penetrate your whole body; and as soon as
you perspire, you may leave off the exercise, for then the
medicine will have had its effect. Immediately on your return to
your palace, go into the bath, and cause yourself to be well
washed and rubbed; then retire to bed, and when you rise to-
morrow you will find yourself cured."

The king took the mace, and struck the ball, which was returned
by his officers who played with him; he played so long, that his
hands and his whole body were in a sweat, and then the medicine
shut up in the handle of the mace had its operation, as the
physician had said. Upon this the king left off play, returned to
his palace, entered the bath, and observed very exactly his
physician had prescribed to him.

The next morning when he arose, he perceived with equal wonder
and joy, that his leprosy was cured, and his body as clean as if
it had never been affected. As soon as he was dressed, he came
into the hall of audience, where he ascended his throne, and
shewed himself to his courtiers: who, eager to know the success
of the new medicine, came thither betimes, and when they saw the
king perfectly cured, expressed great joy. The physician Douban
entering the hall, bowed himself before the throne, with his face
to the ground. The king perceiving him, made him sit down by his
side, presented him to the assembly, and gave him all the
commendation he deserved. His majesty did not stop here: but as
he treated all his court that day, made him eat at his table
alone with him.

The Grecian king was not satisfied with having admitted the
physician Douban to his table, but caused him to be clad in a
rich robe, ordered him two thousand pieces of gold, and thinking
that he could never sufficiently acknowledge his obligations to
him, continued every day to load him with new favours. But this
king had a vizier, who was avaricious, envious, and naturally
capable of every kind of mischief. He could not behold without
envy the presents that were given to the physician, whose other
merits had already begun to make him jealous, and he therefore
resolved to lessen him in the king's esteem. To effect this, he
went to the king, and told him in private, that he had some
information of the greatest consequence to communicate. The king
having asked what it was? "Sire," said he, "it is highly
dangerous for a monarch to confide in a man whose fidelity he has
never tried. Though you heap favours upon the physician Douban,
your majesty does not know that he is a traitor, sent by your
enemies to take away your life." "From whom," demanded the king,
"have you the suggestion which you dare pronounce? Consider to
whom you are speaking, and that you are advancing what I shall
not easily believe." "Sire," replied the vizier, "I am well
informed of what I have had the honour to reveal to your majesty;
therefore do not rest in dangerous security: if your majesty be
asleep, be pleased to awake; for I once more repeat, that the
physician Douban left his native country, and came to settle
himself at your court, for the sole purpose of executing the
horrible design which I have intimated."

"No, no, vizier," interrupted the king; "I am certain, that this
physician, whom you suspect to be a villain and a traitor, is one
of the best and most virtuous of men. You know by what medicine,
or rather by what miracle, he cured me of my leprosy: If he had
had a design upon my life, why did he save me then? He needed
only to have left me to my disease; I could not have escaped it,
as life was fast decaying. Forbear then to fill me with unjust
suspicions: instead of listening to you, I tell you, that from
this day forward I will give that great man a pension of a
thousand pieces of gold per month for his life; nay, though I
were to share with him all my riches and dominions, I should
never pay him sufficiently for what he has done. I perceive it to
be his virtue that raises your envy; but do not think I will be
unjustly prejudiced against him. I remember too well what a
vizier said to king Sinbad, his master, to prevent his putting to
death the prince his son."

What the Grecian king said about king Sinbad raised the vizier's
curiosity, who said, "I pray your majesty to pardon me, if I have
the boldness to ask what the vizier of king Sinbad said to his
master to divert him from putting the prince his son to death."
The Grecian king had the condescension to satisfy him: "That
vizier," said he, "after having represented to king Sinbad, that
he ought to beware, lest on the accusation of a mother-in-law he
should commit an action of which he might afterwards repent, told
him this story."