Gaius Suetonius Tranquillus,
Lives of Eminent Grammarians
“ I speak of Livius [3] and Ennius, [4] who are acknowledged to have taught both languages as well at Rome as in foreign parts. [5] But they only translated from the Greek, and if they composed anything of their own in Latin, it was only from what they had before read. For although there are those who say that this Ennius published two books, one on "Letters and Syllables," and the other on "Metres," Lucius Cotta has satisfactorily proved that they are not the works of the poet Ennius, but of another writer of the same name, to whom also the treatise on the "Rules of Augury" is attributed. ”
