This collection of individual leaves taken from illuminated manuscripts represents works created from the 12th through 15th centuries. The bulk of the collection consists of leaves from various Books of Hours (books with prayers for private devotions) written in Latin or Dutch. Also included are single leaves from Bibles, a Dutch religious calendar, a French epistolary, and a book of homilies by St. Augustine. There is also a illuminated miniature of St. Peter.
On the four Dutch manuscripts, see Rudy, Kathryn M. "Images, Rubrics and Indulgences on the Eve of the Reformation." Pages 443-479 in The Authority of the Word: Reflecting on Image and Text in Northern Europe, 1400-1700, edited by C. Brusati, K. A. E. Enenkel, and W. S. Melion (Leiden: Brill, 2012), and also Gura, David T., A Descriptive Catalogue of the Medieval and Renaissance Manuscripts of the University of Notre Dame and Saint Mary's College (Notre Dame, Indiana: University of Notre Dame Press), page 397.