Institutio Oratoria
Quintilian
Quintilian. Institutio Oratoria, Volume 1-4. Butler, Harold Edgeworth, translator. Cambridge, Mass; London: Harvard University Press, William Heinemann Ltd., 1920-1922.
Further, if the judge is thought to have come into court with a prejudice in favour of one side, we must try to remove or strengthen that prejudice as circumstances may demand. Again occasionally we shall have to calm the judges' fears, as Cicero does in the pro Milone, where he strives to persuade them not to think that Pompey's soldiers have been stationed in the court as a threat to themselves. Or it may be necessary to frighten them, as Cicero does in the Verrines. [*](i. 15.)
There are two ways of bringing fear to bear upon the judges. The commonest and most popular is to threaten them with the displeasure of the Roman people or the transference of the juries to another class [*](e.g. in the Verrines Cicero points out to the jury, then drawn entirely from senators, that they are on their trial. If they fail in their duty, the constitution of the panels will be altered and the equites be admitted as well. ) ; the second is somewhat brutal and is rarely employed, and consists in threatening them with a prosecution for bribery: this is a method which is fairly safe with a large body of judges, since it checks the bad and pleases the good members of the jury, but I should never recommend its employment with a single judge [*]( It must be borne in mind that iudex may be a juryman forming one of a large panel, or a single judge trying a civil action. ) except in the very last resort.
But if necessity should drive us to such a course, we must remember that such threats do not come under the art of oratory, any more than appeals from the judgment of the court (though that is often useful), or the indictment of the judge before he gives his decision. For even one who is no orator can threaten or lay an information.