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ing physicians all over the world in his time. Before he was to be allowed to settle down to his literary work, however, Constantine was to have a very varied experience. Some of this doubtless was to be valuable in enabling him to set the old Arabian teachers of medicine properly before his generation. After his Oriental travels he returned to his native Carthage in order to practise medicine. It was not long, however, before his superior medical knowledge, or, at least, the many novelties of medical practice that he had derived from his contact with the East, drew upon him the professional jealousy of his colleagues. It is very probable that the reputation of his extensive travels and wide knowledge soon attracted a large clientele. This was followed quite naturally by the envy at least of his professional brethren. Feeling became so bitter, that even the possibility of serious personal consequences for him because of false accusations was not out of the question. Whenever novelties are introduced into medical science or medical practice, their authors are likely to meet with this opposition on the part of colleagues, and history is full of examples of it. Galvani was laughed at and called the frogs' dancing-master; Auenbrugger was made fun of for drumming on people; Harvey is said to have lost half of his consulting practice;—all because they were advancing ideas that their contemporaries were not ready to accept. We are rather likely to think that this intolerant attitude of mind belongs to the older times, but it is rather easy to trace it in our own. In Constantine's day men had ready to hand a very serious weapon that might be used against innovators. By craftily circulated rumors the populace was brought to accuse him of magical practices, that is, of producing his cures by association with the devil. We are rather prone to think little of a generation that could take such nonsense seriously, but it would not be hard to find analogous false notions prevalent at the present time, which sometimes make life difficult, if not dangerous, for well-meaning individuals.1 Life seems to have been made very uncomfortable for Constantine in Carthage. Just the extent to which persecution went, however, we do not know. About this time Constantine's work attracted the attention of Duke Robert of Salerno. He invited him to become his physician. After he had filled the position for a time a personal friendship developed, and, as has often happened to the physicians of kings, he became a royal counsellor and private secretary. When the post of professor of medicine at Salerno fell vacant, it is not surprising, then, that Constantine should have been made professor, and from here his teaching soon attracted the attention of all the men of his time.
Constantine seems to have greatly enhanced the reputation of the medical school, and added to the medical prestige of Salerno. After teaching for some ten years there, however, he gave up his professorship—the highest position in the medical world of the time—apparently with certain plans in mind. He wanted leisure for writing the many things in medicine that he had learned in his travels in the East, so as to pass his precious treasure of knowledge on to succeeding generations; and then, too, he seems to have longed for that peace that would enable him not only to do his writing undisturbed, but to live his life quietly far away from the strife of men and the strenuous existence of a court and of a great school.
1 The first dentist who filled teeth with amalgam in New York, some eighty years ago, had to flee for his life, because of a hue and cry set up that he was poisoning his patients with mercury.
There was probably another and more intimate personal reason for his retirement. Abbot Desiderius of the Benedictine Abbey of Monte Cassino, not far away, had become a close and valued friend. Before having been made abbot, Desiderius and Constantine probably were fellow professors at Salerno, for we know that Desiderius himself and many of his fellow Benedictines taught in the undergraduate department there. Desiderius enjoyed the reputation of being one of the most learned men of the time when his election to the abbacy at Monte Cassino took him away from Salerno. His departure was a blow to Constantine, who had learned by years of friendship that to be near his intimate friend, the pious scholarly Benedictine, was a solace in life and a never failing incentive to his own intellectual work. Desiderius seems, indeed, to have been a large factor in influencing the great physician to write his books rather than devote himself to oral teaching, since the circulation of his writing would confer so much more of benefit on a greater number of people. Perhaps another element in the situation was that Desiderius was desirous of having the learned physician, the travelled scholar, at Monte Cassino, for the sake of his influence on the scholarship of the abbey, and for the incentive that he would be to the younger monks to apply themselves to the varied field of knowledge which the Benedictines had chosen for themselves at this time.
Whatever hopes of mutual solace and helpfulness and of the joys of intimate close friendship may have been in the minds of these two most learned men of their time, they were destined to be grievously disappointed. Only a few years after Constantine's entrance into the monastery at Monte Cassino Desiderius was elected Pope. The humble Benedictine did not want to take the exalted position, but it was plainly shown to him that it was his duty, and that he must not shirk it. Accordingly, under the name of Pope Victor III, he became one of the great Popes of the eleventh century. One might think that he could have summoned Constantine to Rome, but perhaps he knew that his friend would prefer the quietude of the cloister, and then, too, probably he wanted to allow him the opportunity to accomplish that writing for which Constantine and himself had planned when the great physician entered the monastery.
All that we know for sure is that some twenty years of Constantine's life were spent as a monk in Monte Cassino, where he devoted his time mainly to the writing of his books. One bond of union there was. Each of the works, as soon as completed, was sent off to the Pope as long as he lived. On the other hand, though busy with his Papal duties, Pope Victor constantly stimulated Constantine, even from distant Bome, to go on with his work. There were messages of brotherly interest and solicitude just as in the old days. The great African physician's best known work, the so-called " Liber Pantegni," which is really a translation of the" Khitaab el Maleki " of Ali Ben el-Abbas, is dedicated to Desiderius. Constantine wrote a number of other books, most of them original, but it is difficult now to decide just which of those that pass under his name are genuine. Many were subsequently attributed to him that are surely not his.
These translators of the Middle Ages proved to be not only the channels through which information came to their generations, but they were also incentives to study and investigation. It is when men can get a certain amount of information rather easily that they are tempted to seek further in order to solve the problems that present themselves. There are three great translators whose work meant much for the Middle Ages at this time. They were, besides Constantine in the eleventh century, Gerard of Cremona, in the twelfth, and the Jewish Faradj Ben Salim, at Naples, in the thirteenth. Gerard did in Spain for the greater Arabian writers what Constantine had accomplished for those of lesser import. Under the patronage of the Emperor Frederick Barbarossa, he published translations of Rhazes, Isaac Judaeus, Serapion, Abulcasis, and Avicenna. His work was done in Toledo, the city in which, during the twelfth and thirteenth centuries, so many translators were at work making books for the Western world.
Constantine did much more than merely bring out his translations of Arabian works. He gave a zest to