This treatise of medicine by Yühannā ibn Sarābiyūn, written in Syriac in the 8th century, translated into Arabic in the 10th century and then into Latin in the 12th century, is a typical example of the transmission of Hippocratic medicine from the Arabic East to the Latin West in the Middle Ages. However, while the complete Latin translation of Gerard of Cremona has reached us, we have only fragments of the Arabic text, dispersed in five manuscripts preserved in four European libraries.
In the first part we shall try to establish the biographical information about the author and the four translators of his treatise from Syriac to Arabic. In the second part we shall study the Arabic fragments of the Paris manuscript and the two Escorial manuscripts, first by examining their language, and then by comparing them to the Latin translation.