In the Historia Arabum (c. 9, p. 17, ad calcem Elmacin), Roderic of Toledo describes the emerald tables, and inserts the name of Medinat Almeyda, in Arabic words and letters. He appears to be conversant with the Mohammedan writers; but I cannot agree with M. de Guignes (Hist. des Huns, tom. i. p. 350), that he had read and transcribed Novairi; because he was dead a hundred years before Novairi composed his history. This mistake is founded on a still grosser error. M. de Guignes confounds the historian Roderic Ximenes archbishop of Toledo in the thirteenth century with Cardinal Ximenes who governed Spain in the beginning of the sixteenth, and was the subject, not the author, of historical compositions.