Erasmi Roterodami Civilitas morum in succinctas quaestiones digesta, ac per Reinhardum Hadamarium locupletata

Although, according to Plutarch, Tullius Cicero himself, when about to speak, smoothed his face with his left hand, yet Quintilian notes this gesture among the faults of pronunciation, saying: Those things are faulty, to stare at the ceilings, to rub the face.

X.
What sort ought the nostrils to be? Clean and free from all purulent mucus.

XI.
Is it becoming to wipe the nostrils with a cap or garment? No, but with a handkerchief, and that while turning the body slightly if any more honorable persons are present: for the former is the way of rustics, the latter is that of fishmongers.

XII.
Should phlegm be smeared on clothing? By no means, but having wiped the nose with two fingers, it should be dropped onto the ground and immediately trodden underfoot, lest the filth of the mucus cause nausea for anyone.

XIII.
Is it decorous to emit a voice or snorts from the nostrils? By no means: for that is the way of horn-players and elephants, the latter is for the furious.

XIIII.
Why is it not becoming to breathe with a sound? Because it is a sign of bile and phrensy.