(GB-Lbl Add. MS 31390)No.4John Shepherd (= John Shepperd) "Sabatum" original motet : regretly I don't know. Cantus firmus : Alto Title : Please see the image. Perhaps "Sabatum", my reading, is correct. bar1-40 : A Part bar41-72 : B Part http://aeolianconsort.chakin.com/GB-Lbl_Add_MS_31390.htm