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Faint blue library stamp at top center: THE UNIVERSITY LIBRARY / UNIVERSITY OF CALIFORNIA
original: "Ioannis Philoponi." John Philoponus (c. 490 – c. 570) was an Alexandrian Christian philosopher and scientist who wrote extensive commentaries on the works of Aristotle.
Prior Analytics: A foundational text by Aristotle (4th century BCE) that established the rules of formal logic, specifically the theory of the syllogism.
original: "Academiae Litterarum Regiae Borussicae." This prestigious institution sponsored the "Commentaria in Aristotelem Graeca" project to produce definitive editions of ancient Greek commentaries.