The most dangerous lovers women have are men of Cordis's feminine temperament. Such men, by the delicacy and sensitiveness of their own organizations, read women as easily and accurately as women read each other. They are alert to detect and interpret those smallest trifles in tone, expression, and bearing, which betray the real mood far more unmistakably than more obvious signs.

Ch. 4. - Dr. Heidenhoff's Process (1880)