Institutio Oratoria
Quintilian
Quintilian. Institutio Oratoria, Volume 1-4. Butler, Harold Edgeworth, translator. Cambridge, Mass; London: Harvard University Press, William Heinemann Ltd., 1920-1922.
In scholastic declamations the fictitious themes for deliberative speeches are often not unlike those of controversial speeches and are a compromise between the two forms, as for instance when the theme set is a discussion in the presence of Gaius Caesar of the punishment to be meted out to Theodotus; for it consists of accusation and defence, both of them peculiar to forensic oratory.
But the topic of expediency also enters into the case, in such questions as whether it was to Caesar's advantage that Pompeius should be slain; whether the execution of Theodotus would involve the risk of a war with the king of Egypt; whether such a war would be highly inopportune at such a critical moment, would prove dangerous and be certain to last a long time.
There is also a question of honour. Does it befit Caesar to avenge Pompeius' death? or is it to be feared that an admission that Pompeius did not deserve death will injure the cause of the Caesarian party?
It may be noted that discussions of such a kind may well occur in actual cases.
For my part while I realise that deliberative themes do not require an exordium, for reasons which I have already stated, I do not, however, understand why they should open in such a wild and exclamatory manner. When a man is asked to express his opinion on any subject, he does not, if he is sane, begin to shriek, but endeavours as far as possible to win the assent of the man who is considering the question by a courteous and natural opening.