David Juste, ‘MS Paris, Bibliothèque nationale de France, lat. 16200’ (update: ), Ptolemaeus Arabus et Latinus. Manuscripts, http://ptolemaeus.badw.de/ms/141, suggests that the exemplar on which the above copy was based may be BnF MS lat. 14738, a 12th century copy. Juste indicates that Gerard of Cremona completed his translation between c. 1150 and 1187.