Contents MS 139 contains an abbreviated version of a work on canon law by the mid-12th century canon lawer and teacher, Gratian. Gratian's original work, a text that organised and compiled various sources and teachings on canonical law, was completed in a second version in the 1150s, a decade after the work first appeared. Due to its practical use for teaching on canon law, this second version of Gratian's work became widely copied and read in the medieval period, and is known as the 'Decretum...