The general health of the criminal is good. Up to twenty-five years of age he is as hardy and vigorous as the average person. Although he comes from the slums, he gets somehow a very fair constitution; and if he would only take care of it, he might live to a good old age. When he nears his thirtieth year, however, his strength and vigor begin to fail him. By that time he has served a number of terms in prison, and it is this existence that drags him down. In the open he seems able to endure a great deal and still keep his health; but behind the bars, care for him as the penologists will, he weakens and withers away. This side of his life has scarcely received the attention it deserves from investigators who find the criminal diseased. That he becomes diseased must be readily admitted; but, as a rule, it is only after society has shut him up in its penal institutions. Stand, for instance, at the doors of one of these institutions when a ten-year convict is released, and see how he looks. I once did this; and a worse wreck of a formerly strong man I have never encountered--a being ruined in both body and mind, a victim of passions which in the open he would have abhorred. There is no better proof that it is the prison, and not his life and business, that makes the criminal diseased than that furnished by tramps. These men live almost entirely in the open, and, as a general rule, have a harder life than a criminal; yet they are about the healthiest people in the world. In the United States it is one of their superstitions that they simply cannot die, like other men, of disease, but have to be killed. This is what happens to a great many of them. They fall from freight-trains at night, or are found starved to death, locked fast in a box-car on some distant side-track. III Finding the criminal diseased and abnormal physically, it is only natural that investigators should have found him equally abnormal in mind; but this, too, I have not discovered.