Single folio on vellum. Flanders, ca. 1290: 104 mm x 76 mm (justification 75 mm x 51 mm). Single column, 19 lines. Decoration: one two-line initial I in gold on pink and blue grounds; 15 one-line initials alternating gold and blue with contrasting penwork; intricate line-fillers. Text: end of Ps 65 and opening of Ps 66. Condition: good; evidence of hinges on the verso.