Institutio Oratoria
Quintilian
Quintilian. Institutio Oratoria, Volume 1-4. Butler, Harold Edgeworth, translator. Cambridge, Mass; London: Harvard University Press, William Heinemann Ltd., 1920-1922.
On the other hand there is no objection to complaining of the conduct of the advocates on either side, so long as our complaint follows accepted practice and does not overstep the limits imposed by good manners; I refer to complaints such as that our opponents have abridged, obscured or postponed the discussion of some point, or with deliberate cunning have avoided discussing it at all.