Typical cases only can be taken, in number according to their
[Illustration: CRIMINALS' WEAPONS: REVOLVERS, KNUCKLE DUSTERS, AND LIFE PRESERVERS IN THE BLACK MUSEUM.
relative interest and importance, but all more or less illustrating and embracing the hydra-headed varieties of crime. We shall see murders most foul, committed under the strangest conditions; brutal and ferocious attacks, followed by the most cold-blooded callousness in disposing of the evidences of the crime. In some cases a man will kill, as Garofalo puts it, "for money and possessions, to succeed to property, to be rid of one wife through hatred of her or to marry another, to remove an inconvenient witness, to avenge a wrong, to show his skill or his hatred and revolt against authority." This class of criminal was well exemplified by the French murderer Lacenaire, who boasted that he would kill a man as coolly as he would drink a glass of wine. They are the deliberate murderers, who kill of malice aforethought and in cold blood. There will be slow, secret poisonings, often producing confusion and difference of opinion among the most distinguished scientists; successful associations of thieves and rogues, with ledgers and bank balances, and regularly audited accounts; secret societies, some formed for purely flagitious ends, with commerce and capitalists for their quarry; others for alleged political purposes, but working with fire and sword, using the forces of anarchy and disorder against all established government.
The desire to acquire wealth and possessions easily, or at least without regular, honest exertion, has ever been a fruitful source of crime. The depredators, whose name is legion, the birds of prey ever on the alert to batten upon the property of others, have flourished always, in all ages and climes, often unchecked or with long impunity. Their methods have varied almost indefinitely with their surroundings and opportunities. Now they have merely used violence and brute force, singly or in associated numbers, by open attack on highway and byway, on road, river, railway, or deep sea; now they have got at their quarry by consummate patience and ingenuity, plotting, planning, undermining or overcoming the strongest safeguards, the most vigilant precautions. Robbery has been practised in every conceivable form: by piracy, the bold adventure of the sea-rover flying his black flag in the face of the world; by brigandage in new or distracted communities, imperfectly protected by the law; by daring outrage upon the travelling public, as in the case of highwaymen, bushrangers, "holders-up" of trains; by the forcible entry of premises or the breaking down of defences designed against attack--by burglary in banks and houses, "winning" through the iron walls of safes and strong-rooms, so as to reach the treasure within, whether gold or securities or precious stones; by robberies from the person, daring garrotte robberies, dexterous neat-handed pilfering, pocket-picking, counter-snatching; by insinuating approaches to simple-minded folk, and the astute, endlessly multiplied application of the time-honoured Confidence Trick.