Jerome, Apol. adv. Rufinum, i. 2, says that the total length of the Commentaries on Job and the Psalms was about 40,000 lines, i.e. Virgilian hexameters. The latter, at a tough estimate, must be nearly 35,000 lines in its present state. But Jerome, as we shall see, was not acquainted with so many Homilies as have come down to us; we must deduct about 5,000 lines, and this will leave l0,000 for the Commentary on Job, making it two sevenths of the length of the other. Jerome, however, is not careful in his statements of lengths; he calls the short De Synodis ‘a very long book,’ Ep. v. 2.