As for the assessment of the mental characters of prisoners, the value of it will largely depend on the ability of the examiner to place himself in touch with them. Few people believe nowadays that by feeling the knobs on the outside of a man's head you can tell the faculties within, far less whether these faculties will be used for good or ill; and we are not likely to advance the study of the criminal by founding conclusions on the measurements of his head, facial angle, etc. The new phrenology differs from the old in respect that it changes its terms and insists on more exactness of measurement. Like the old, it may be fairly successful in judging men after they have shown their qualities. No one has yet discovered a reliable means of estimating the nature, quality, and amount of a man's mental powers from his appearance. We may learn what he says or does, but we can never be sure what he thinks. In practice we are all continually forming estimates of those we meet. Some judge by the clothes, some by the expression, most of us not knowing how. So far as our impressions are concerned, however we think they have been arrived at, we all make mistakes and have all to revise our opinions. The man who prides himself on his ability to read character is usually the man who makes the most mistakes; his confidence misleads his judgment. Even the shrewdest are occasionally deceived after many and varied opportunities of arriving at a correct estimate of their friends or enemies, yet for his own purposes each man's judgment may be, in the main, satisfactory and no one troubles about his neighbour's methods; but when they are erected into a science it is time to protest. The size and shape of the head, its malformations and asymmetry, may be measured with a fair amount of success. This and more has been done with a view to the future identification of individuals; but the theory underlying the practice of taking such measurements is that no two criminals are alike. The theory the criminologists seek to establish is that they are all very much alike. It is stated that so many men who have committed crimes have heads of a certain conformation, have peculiarities in the character of their skulls. If these physical deviations have a causal relation to their conduct, since the heads cannot be altered the criminals are therefore outwith reform. The Church-people, on the other hand, hold that all wrongdoing springs from "the heart"--not meaning thereby the physical organ so called. You cannot give a man a new head free from the objectionable shape; but men have developed a new spirit, and from being bad have become good citizens without undergoing any physical alteration; so that after all it would appear that "The heart aye's, the part aye, That makes us right or wrong." CHAPTER II HEREDITY AND CRIME