Jean Gianini is not of that type; he is a _high-grade_ imbecile; he is of the grade that is only recognized by those who are intimately familiar with imbeciles of all types. He is only discovered when we make a close comparison between him and normal boys of the various ages. We may perhaps liken it to the question of tuberculosis: the average man never recognizes a fellow being as suffering from consumption until he is afflicted with a cough which does not yield to treatment, is constantly expectorating, gets thin and pale, and has other marked outward symptoms; the average person would not find more than one or two consumptives among a hundred persons; the expert physician, however, experienced with tuberculosis, recognizes many more by signs and symptoms which he can describe with great accuracy, and when he is allowed to apply his physiological tests and his clinical thermometer and his microscope, the number increases enormously, and he assures us that every seventh person will die of tuberculosis. It is hard then for many people to accept the verdict that Jean Gianini is an imbecile, largely because they do not realize what a high-grade imbecile is. A second reason is found in the fact that we insist upon believing the unbelievable. We view a crime like the one under discussion and say frankly, "It is unbelievable that any reasoning, intelligent person could commit such an atrocious act," and yet we believe that this boy did; we believe that such a grade of villainy exists and that it can suddenly appear in a boy who never before manifested anything approaching it. The fact is, that our instinctive revulsion against such a thought is the correct view. The fact that Jean Gianini committed such a crime is itself the strongest kind of evidence that he is not a normal boy. But turning from imbecility in the abstract, let us examine concrete instances in the life of Jean Gianini, for we shall find there the best possible illustrations of the characteristics of an imbecile.