in addition he wrote a large number of original treatises—such, for example, as a complete set of commentaries on the writings of Hippocrates, a practical work on the diseases of the eyes, etc.
The following account of Honein's experience at the Court of the Caliph Moutaouakkel (middle of the ninth century A. D.) furnishes some insight into his character:—
The Caliph, who had heard of the great learning, ability, and
industry of Honein, but who had at the same time feared that he
might be in secret communication with the Greeks, decided to
subject him to a test that would reveal how far he was venal.
Accordingly he sent for him, clothed him in robes of honor, gave
him 50,000 drachmae, and then said:
"I wish that thou wouldst prepare for me a secret combination of drugs which will enable me to get rid of one of my enemies."
Honein replied: "I have no knowledge of any but salutary remedies, and it never occurred to me that the Prince of Believers might ask me to furnish those of a different kind. However, if it be the wish of your Majesty, I will see what I can do; but I shall require plenty of time."
After waiting in vain for the desired preparation and finding that even threats failed to accomplish anything the Caliph put Honein in prison. Then, at the end of a year, which interval the latter had employed diligently in the work of translating, Moutaouakkel gave orders for the prisoner to be brought into his presence. Before this was done, however, a heap of objects of value was placed on one side of the room and instruments of torture on the other. When Honein was brought in, the Caliph said to him: "Time is passing, and my wishes have not yet been gratified. If thou art now ready to obey my behest, these treasures and many others in addition shall be thine. But, if thou continuest to refuse, I will subject thee to tortures and will finally put thee to death."
"I have already told the Prince of Believers," replied Honein, "that my knowledge is limited to the preparation of salutary remedies."
Whereupon the Caliph said: "Have no fear! I simply wished to test thee! But tell me, what are the reasons upon which thy refusal is based?"
"There are two reasons," replied Honein: "my religion and my profession. The first teaches us to do good to our enemies; and
