Contents ff. ff. 3r-87v; 89r-98v; 116r-118v of MS 135 appear to be a version of a set of medieval commentaries on Aristotle's logic, by the 14th-century logician Walter Burley. Burley produced many commentaries, and multiple versions of his commentaries and other works, and the short commentaries found in MS 135, Isagoge, Predicamenta, Liber sex principiorum, Perihermeneias are from a collection produced in the later part of Burley's career, in a work titled ...