'Information concerning Muḥammad'
Date: Approximately 1271
Original Language: Latin
Some 33 pages long in Engel’s edition, William’s treatise on the ‘knowledge’ or ‘information’ (notitia) concerning Muḥammad addresses three topics: ‘First, who Muḥammad was, and whence and how his nation (gens), who are called Saracens, and their sect spread so violently and powerfully. Second, concerning the book of the law of Muḥamm…