"If you will take off the cover," he said, "I will repay you."
"No," answered the fisherman, "if I trust myself to you I am afraid you will treat me as a certain Greek king treated the physician Douban. Listen, and I will tell you."
The Story of the Greek King and the Physician Douban
In the country of Zouman, in Persia, there lived a Greek king. This king was a leper, and all his doctors had been unable to cure him, when a very clever physician came to his court.
He was very learned in all languages, and knew a great deal about herbs and medicines.
As soon as he was told of the king's illness he put on his best robe and presented himself before the king. "Sire," said he, "I know that no physician has been able to cure your majesty, but if you will follow my instructions, I will promise to cure you without any medicines or outward application."
The king listened to this proposal.
"If you are clever enough to do this," he said, "I promise to make you and your descendants rich for ever."
The physician went to his house and made a polo club, the handle of which he hollowed out, and put in it the drug he wished to use. Then he made a ball, and with these things he went the next day to the king.