The fragments were used as quire guards in the binding of Aurelius Brandolinus, De ratione scribendi libri tres printed by Joannes Oporinus in Basel in 1549 (Antwerpen, Erfgoedbibliotheek Hendrik Conscience, C 1074).
Pen-flourished initials with interior reserved shapes and marginal extensions (J-staff border), alternately in red and blue ink. Red rubrication and red underlining.