Jerome, Epistulae, 20.5. Jerome also makes reference to a Gospel According to the Hebrews sometimes in such a way as to be unclear whether it is a Hebrew Matthew or some apocryphal Hebrew gospel (Epistulae, 120.8; in Mattheum, 12, 13). In at least one instance he says the Gospel According to the Hebrews was written in the Chaldaic and Syriac (i.e., Aramaic) language but with Hebrew letters (Adversus Pelagianos, 3.2). Whatever this gospel was, it was written in Aramaic, not Hebrew.