Institutio Oratoria
Quintilian
Quintilian. Institutio Oratoria, Volume 1-4. Butler, Harold Edgeworth, translator. Cambridge, Mass; London: Harvard University Press, William Heinemann Ltd., 1920-1922.
For in such passages greater emotional effect is produced if both hands co-operate, short gestures being best adapted to matters of small importance and themes of a gentle or melancholy character, and longer gestures to subjects of importance or themes calling for joy or horror.
It is desirable also that I should mention the faults in the use of the hands, into which even experienced pleaders are liable to fall. As for the gesture of demanding a cup, threatening a flogging, or indicating the number 500 by crooking the thumb, [*](Le. crooking the thumb against the forefinger to represent the symbol D. ) all of which are recorded by writers on the subject, I have never