The identification of the translator known as Robert of Ketton and the archdeacon known as Master Robert is provided by a letter of Peter the Venerable, abbot of Cluny. In the spring or summer of 1144, when Peter sent some of Robert's translations to Bernard of Clairvaux. In the accompanying letter he named the translator as "Robert of Ketton from England, who is now archdeacon of the church of Pamplona" (Roberto Ketenensi de Anglia, qui nunc Pampilonensis ecclesiae archidiaconus est).[1]