Institutio Oratoria

Quintilian

Quintilian. Institutio Oratoria, Volume 1-4. Butler, Harold Edgeworth, translator. Cambridge, Mass; London: Harvard University Press, William Heinemann Ltd., 1920-1922.

But in the plural they used e and wrote Syllae, Galbae. Lucilius has given instructions on this point also; his instructions occupy quite a number of verses, for which the incredulous may consult his ninth book.