 Syrianus’ work on Aristotle’s Metaphysics is transmitted in some 18 manuscripts dating from the 15th and 16th centuries, two of which, Parisinus Graecus 1896 and Hamburgensis phil. gr. 2, are superior to the others. The extant text does not offer a unified and comprehensive interpretation of the Metaphysics. For one thing, the commentary covers only four of the fourteen treatises that now make up the collection of work that came “after the Physics”. In addition, Syrianus’ work is a collection of three separate essays of quite different character and purpose, one essay on the aporetic book III (=Beta), one on book IV (=Gamma), and one on books XIII and XIV (=Mu and Nu). Already the titles of these separate parts (regardless of whether they are Syrianus’ own) indicate the differences: