The Rare Book Department features one of the world's most renowned Charles Dickens collections, with first editions, personal letters, and Dickens’ stuffed pet raven, Grip, as well as extensive collections of illuminated manuscripts, Americana, Beatrix Potter, early children's books, Edgar Allan Poe, Pennsylvania German folk art, and more. The collection includes over 50 Books of Hours and numerous bibles, liturgical texts, and psalters, including the Lewis Psalter (Lewis E M 185), a masterpiece of Parisian illumination from the reign of Saint Louis.