Non-consecutive bifolium of a manuscript liturgical psalter on vellum, with text from the Vulgate, including Psalms 88 and 20. Written in single columns per page of twenty lines. Initials alternate between blue and red ink with additional rubrication throughout. Reconfigured as a book cover with glued-in pasteboards that cover one side. "xxiii" at head of right page. "A. 1678" at foot of right page and "1678" on the spine of what would have been the book cover.