The Life of Ambrose was written by Paulinus of Milan, who was not a presbyter, but a deacon (see the letter of Paulinus to Bishop Zosimus in Collectio Avellana 47). Isidore might have confused him with Paulinus of Nola, who was a presbyter, especially that he also ascribes to this Paulinus the book "on the blessings of the patriarchs." Such book was written by Rufinus of Aquileia and dedicated to the presbyter Paulinus (von Dzialowski 1898; Codoner 1964: 23).