Institutio Oratoria
Quintilian
Quintilian. Institutio Oratoria, Volume 1-4. Butler, Harold Edgeworth, translator. Cambridge, Mass; London: Harvard University Press, William Heinemann Ltd., 1920-1922.
others who wore a perpetual frown, and yet others who could not keep their eyebrows level, but raised one towards the top of the head and depressed the other till it almost closed the eye.