This is the third and final volume describing manuscripts and fragments in British libraries containing commentaries and glosses on the Latin Aristotle. It covers institutional libraries from Aberdeen to York, including cathedral libraries, and lists 193 main items (including fragments dismembered from several books), dating from the twelfth century until c.1500. While many of these manuscripts have come to Britain from elsewhere in Europe and were only acquired post-1500, they represent teaching and learning not only in the Universities of Oxford and Cambridge but also in continental universities. A majority of them are now held in the British Library, London, and many have not been fully described before. The volume also includes addenda from Oxford and Cambridge, and four indexes are provided to facilitate searching the main text.