From the end of the seventeenth century, in fact, one observes a considerable diminution in murders and, generally speaking, in physical acts of aggression; offences against property seem to take over from crimes of violence; theft and swindling, from murder and assault; the diffuse, occasional, but frequent delinquency of the poorest classes was superseded by a limited, but ‘skilled’ delinquency; the criminals of the seventeenth century were ‘harassed men, ill-fed, quick to act, quick to anger, seasonal criminals’; those of the eighteenth, ‘crafty, cunning, sly, calculating’ criminals on the fringes of society