Nicene and Post-Nicene Fathers, Ser. II, Vol. VI: The Letters of St. Jerome.: Letter CII
Jerome’s reply to the foregoing in which, it has been said, friendship struggles with suspicion and resentment. He warns Augustine not to provoke him, lest old as he is he may prove a dangerous opponent; and encloses part of his reply to the apology of Rufinus. Written in 402 a.d. See Augustine, vol. i., Letter XXXIX.