Out of more than 400 murderers Bruce Thomson had known, only three expressed remorse. Of the 4000 criminals who have passed through Elmira, 36.2 per cent. showed on admission positively no susceptibility to moral impressions; only 23.4 per cent. were “ordinarily susceptible.” Dr. Salsotto, in his recent study of 130 women condemned for premeditated assassination or complicity in such assassination,[56] was only able to recognise genuine penitence in six. He is careful to point out that precise statistics on this point are of no great value, unless they are associated with a very intimate knowledge of individual criminals; the assumed penitence is seldom real, and the real penitence is not obtrusive. Dostoieffsky, the most profound student of the human heart who has ever studied criminals intimately, has noted this fact--“In one prison there were men whom I had known for several years, whom I believed to be savage beasts, and for whom, as such, I felt contempt; yet at the most unexpected moment their souls would involuntarily expand at the surface with such a wealth of sentiment and cordiality, with such a vivid sense of their own and others’ suffering, that scales seemed to fall from one’s eyes; for an instant the stupefaction was so great that one hesitated to believe what one had seen and heard.” The moral insensibility of the instinctive criminal is the cause of his cruelty, a cruelty which he frequently displays from his childhood. Rossi found in ten of his 100 criminals an exaggerated and precocious cruelty; one of them, as a child, used to take young birds, pull out their feathers, and roast them alive; another revenged himself on birds for the punishments imposed on him by his parents. A certain amount of cruelty is, however, almost normal in healthy children. The instinctive criminal is more distinctively marked by his continuance of the same practices throughout life. At Buenos Ayres a man killed his father in order to rob him, and not finding the money, he placed his mother’s feet on the fire to make her confess that of which she was ignorant. Another, after killing an entire family, played with the corpses of the children by throwing them in the air and catching them alternately. Another, mentioned by Lombroso, when shown a photograph of his wife whom he had murdered, testified to the identity without the tremor of an eyelid, tranquilly adding that after inflicting the fatal wound he had asked for forgiveness, which had not been granted. A little nursemaid poisoned the twin children under her care with the phosphorus from a box of matches, in order to procure the excitement of going out to the doctor’s and the chemist’s.[57]