The hatred or jealousy of the baby is a painful feature in many of these cases. It is the jealousy of a mind that is feeble. This jealousy led a young girl of gentle birth to commit a murder which attained world-wide notoriety. Constance Kent killed her baby brother because she was jealous of him. There are several Constance Kents among these mentally deficient children, and many a baby meets with a fate which is supposed to be accidental, but the accident was materially contributed to by a brother or a sister. For some of these children certain objects have an irresistible fascination. There is no story more remarkable than that of the boy of fourteen in Paris who had murdered first an old woman and then an old man, solely in older to get possession of the cheap watches they wore. After the boy's arrest several watches were found concealed in his home. They had no money value to him. He was simply collecting watches, and did not hesitate to kill in order to add to the number. To get possession of some trifling and valueless ornament, a string of beads, a penny brooch, a toy, a few marbles, young children of the unfortunate class I am dealing with have laid the most elaborate plans. One youthful desperado noticed that a little girl on Sundays wore a string of beads to which was attached a lucky threepenny-bit--a threepenny-bit with a hole in it. The child was always with an elder sister on Sundays, and there was no chance of a highway robbery. Moreover, the children knew the boy, and if he snatched the necklace they would tell their parents who did it. He wormed himself into the confidence of the children, and ascertained that on week-days the necklace was kept put away in a drawer in the bedroom with the Sunday clothes. On that information he acted. One day, when only the mother was at home, the sisters being out playing in another street near the school, the young hopeful suddenly rushed into her room. "Oh, Mrs. Jones," he exclaimed, "there's a little girl been run over in the next street, and I think it's your Annie!" Off went Mrs. Jones, and the boy instantly made his way into the bedroom, found the drawer, opened it, and abstracted the necklace with the lucky threepenny-bit on it. In all the cases that I know of childish criminality of the insane type--none of these children are of normal intellect--there is a family history which accounts for everything. In the case of a little lad who broke into a house for the sole purpose of killing a canary--and he killed it cruelly--the mother and father were "afflicted," and the eight children of the family were all of violent temper and a source of constant annoyance to the neighbours. Six of them had been certified for "special instruction"--i.e., to be sent to the schools specially arranged for the feeble-minded. It was for a long time a widely entertained idea that for a great deal of juvenile crime the sensational stories called "Penny Dreadfuls" were largely responsible.