Institutio Oratoria

But I know that it is of frequent occurrence for a speaker to expose his side by stretching his arm too far, to be afraid in one case of extending his hand beyond the folds of his cloak, and in another to stretch it as far as it will go, to raise it to the roof, or by swinging it repeatedly over his left shoulder to deliver such a rain of blows to the rear that it is scarcely safe to stand behind him, or to make a circular sweep to the left, or by casting out his hand at random to strike the standers-by or to flap both elbows against his sides.

There are others, again, whose hands are sluggish or tremulous or inclined to saw the air; sometimes, too, the fingers are crooked and brought down with a run from the top of the head, or tossed up into the air with the hand turned palm upwards. There is also a gesture, which consists in inclining the head to the right shoulder, stretching out the arm from the ear and extending the hand with the thumb turned down. This is a special favourite with those who boast that they speak

with uplifted hand.