Res Gestae
Ammianus Marcellinus
Ammianus Marcellinus. Ammianus Marcellinus, with an English translation, Vols. I-III. Rolfe, John C., translator. Cambridge, MA; London: Harvard University Press; W. Heinemann, 1935-1940 (printing).
Now the infinite carvings of characters called hieroglyphics, which we see cut into it on every side, have been made known by an ancient authority of primeval wisdom.[*](Cf. Diod. Siculus, iii. 3, 5, who says that hieroglyphics were understood by the priests alone, and that the knowledge was handed down from father to son.)