Arthur M. Lewis, The Art of Lecturing
“ How often has one seen a chairman during the lecture, conscious that he is in full view of the audience, crossing his legs, first one way, then the other, trying a dozen different ways of disposing of his hands with becoming grace, fumbling with his watch chain, looking at his watch as if the speaker had already overstepped his time, looking nervously at his program as if something of enormous importance had been forgotten, and doing a dozen similar things, most of them unconsciously, but none the less continuously diverting the attention of the audience from the speaker and his speech. ”
