Together with a fragment from an ethical treatise by Joshua di Viana, is an exchange of letters between Chasdai ibn Shaprut, the head of the Jewish community in Cordova, Spain, and Joseph, the King of the Khazars. The letter is the basis of the Kuzari, a philosophical work by Yehuda Halevi written some two hundred years after this correspondence. These letters were printed in many editions of the Kuzari translated by Ibn Tibun into Hebrew and differ somewhat from the text of this manuscript. The verse preceding the letter and the letter from Chasdai is much the same with small variations, but the reply from King Joseph has several important variations. The Christ Church codex is the only known manuscript of the first letter.For detailed descriptions, please see www.chch.ox.ac.uk/library-and-archives/digital-library.