1793. I was instructed that these are they who constitute the pituitary mucus of the brain, which is wont to obstruct the sieve-like lamina [or plate], making the brain to stagnate like a kind of excrementitious ground, whence arise dullness and similar insanities. I was informed, too, that a like class of men are those who make it a rule to cause dissensions and enmities among all others, or who, as the saying is, divide in order to rule, and that, too, without conscience, like many politicians, thus placing prudence in the enmities, intestine strifes, and hatreds which they can kindle among others. They are altogether external men, because they obstruct, as was said, the nasal respiration, so that it is determined through the mouth, and thus into the pharynx, entirely contrary to the natural mode of respiration, which is through the nostrils, by reason of the agreement of the brain and its animation with external things; thus these persons break the communications between interior and exterior things.