Institutio Oratoria

For example, when the speaker sits on the left side of the judge, he will have to advance his right foot, while if he be seated on the right, many of his gestures must be made from right to left, in order that they may be addressed to the judge. Personally, I note that many speakers start up at the conclusion of individual periods, while some proceed to walk to and fro for a little: it is for them to decide whether this is becoming or not: I will merely remark that, when they do this, they are not pleading seated.

It was a common custom, which has not entirely disappeared, to drink or even to eat while pleading; but I shall not permit my ideal orator to do anything of the kind. For if a man cannot endure the burdens imposed by oratory without having recourse to such remedies, he should not find it a serious hardship to give up pleading altogether, a course which is far preferable to acknowledging his contempt both for his profession and his audience.