Desiderius Erasmus,
The Colloquies of Erasmus, Volume I
“ It is a Piece of Civility to salute those that come in your Way; either such as come to us, or those that we go to speak with. And in like Manner such as are about any Sort of Work, either at Supper, or that yawn, or hiccop, or sneeze, or cough. But it is the Part of a Man that is civil even to an Extreme, to salute one that belches, or breaks Wind backward. But he is uncivilly civil that salutes one that is making Water, or easing Nature. ”
