A collection of astronomical and mathematical texts copied by multiple hands, containing works of Garlandus, Bede, et al. In the early-mid 14th century the manuscript was in the possession of J. de Muris, who annotated the texts and added to the volume's contents. The only musical item in this source is the incomplete tenor voice of the motet Vos/Gratissima which was written as marginalia on f. 223v (image 447 on the digitization of the Real Biblioteca del Monasterio de San Lorenzo de El Escorial).