This volume of letters is a companion to R.S. O'Fahey's "Enigmatic Saint: Ahmad Ibn Idris and the Idrisi tradition" (Hurst, 1990), and provides primary source material that substantiates points more lightly touched upon in the main work. The Arabic text of the collected letters is printed along with the English translations. This makes the work additionally valuable to advanced students of Arabic, who are in need of such classical Islamic texts.