 Another Peter of Spain, referred to as Petrus Hispanus non-papa, has been identified as the author of the Summa ‘Absoluta cuiuslibet’, a late twelfth-century handbook on syntax closely linked with Priscian’s Institutiones grammatice, libb. XVII and XVIII, which became very popular later in the Middle Ages under the name Priscianus minor (Kneepkens 1987). The chronology of this work seems to rule out that this Peter of Spain is the same author as the author of the Tractatus.