Note 219 — Chapter III · THEORY AND PRAXIS OF THE TEXTUAL CRITICISM OF THE NEW TESTAMENT.[129] (continued 2)
William Edie translation
Defending the plurality of the canonical Gospels against the Marcionites, he says: τὸ ἀληθῶς διὰ τεσσάρων ἕν ἐστιν εὐαγγέλιον (Philocalia, ed. Robinson, 47; Zahn, GK. i. 412; PRE3, v. 654). From what Origen says, Contra Celsum, vi. 51, it would seem that he himself heard Tatian.