Compare Origen’s Hom. I. in Lucam: Ecclesia quatuor habet evangelia, hæresea plurima; and multi conati sunt scribere, sed et multi conati sunt ordinare: quatuor tantum evangelia sunt probata, &c. Compare also Irenæus, Adv. Hær. III. 11, 8, where the attempt is made to show that it is impossible for the Gospels to be either more or fewer in number than four; and the Muratorian Fragment where the four Gospels are named, but the number four is not represented as in itself the necessary number; also Tertullian’s Adv. Marc. IV. 2, and elsewhere.