QUsTA IBN LUQA AL-BA'ALBAKKI, born ca. 205 A.H., 820 A.D., died 300 A.H., 912 A.D., was a native of Baalbek in Syria. In origin he was a Greek,' in religion a Christian,2 by profession and occupation a physician, philosopher, astronomer, mathematician, and musician. He journeyed to the Byzantine lands, and brought back to Baghdad many scientific works in Greek. Knowing well the Greek and Syriac languages, and of course Arabic, in which he was reputedly a master of style, he settled in Baghdad and engaged in the translation of such scientific works, the employment of other persons in translation, and the redaction of existing translations. Later on he was induced by a certain SANHARIB to migrate to Armenia and establish himself there. He then engaged in the production of original scientific works for a certain ABU L-GHITRIF AL-BATRIQ, a learned, distinguished, and generous man, and for others, such as ISMA'TL IBN BULBUL and ABU L-HASAN 'ABDALLAH IBN