Institutio Oratoria

Quintilian

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

some wrote ai in all cases, as in Greek, others confined its use to the dative and genitive singular; whence it comes that Vergil, [*](Aen. ix. 26 and vii. 464. ) always a passionate lover of antiquity, inserted pictai uestis and aquai in his poems.