Among his pupils was John of Salisbury, who describes him as a man commended both by his life and his learning, in 1141 or 1142. In 1143 he is still described as Archdeacon of Rochester and in or about that year he probably went to Rome on the invitation of Innocent II, who died in September of that year, but Pullen found favour with the new pope, Celestine II, who created him a cardinal (Ciaconius). The Oseney chronicler, however, states that he was called to Rome by Lucius II who succeeded Celestine in 1144.
Among his students was John of Salisbury, who described him as a man commended both by his life and his learning, in 1141 or 1142. In 1143 he is still described as Archdeacon of Rochester and in or about that year he probably went to Rome on the invitation of Innocent II, who died in September of that year, but Pullen found favor with the new pope, Celestine II, who created him a cardinal (Ciaconius). The Oseney chronicler, however, states that he was called to Rome by Lucius II who succeeded Celestine in 1144.