Blackmailers are ever on the alert to learn anything detrimental to a person's character, and let them once obtain this, they fatten on it. Men's passions are taken advantage of by that particular class of thieves known as "badgers," and their operations are very rarely followed by exposure or punishment. A pretty woman is the bait used by these thoughtful rascals, who know full well that where a hundred men will resist a burglar, scarcely one will resist a robbery where disgraceful publicity must surely follow. Briefly the mode of procedure is as follows: A house is rented in a quiet side street, not far from the principal thoroughfare. One man, occasionally two men, run the house--that is, they do the actual stealing, while they have from three and often as high as a dozen women out on the street picking up the victims. MUST HAVE PRETTY WOMAN. The qualifications necessary for the woman to have is to be pretty, plump, wear good clothes, and understand the art of making herself attractive. It is an understood thing that she shares one-third the proceeds of the robbery. The house is arranged especially for the purpose. The rooms on each floor are fixed so that the door separating them has the panels cut out and put in again on hinges, and fastened with a small button not noticeable. The hinges are well oiled, and a small hole is bored through the door, so that the thief can see into the room, or hear any slight signal given by the woman. The house rented has a front and rear entrance, the latter for the thief or thieves, who always station themselves on a corner of the street near the house, by which the woman will always bring the victim, so her pal can see him. The woman goes out in the evening past the principal hotels and through the principal streets, never speaking to a man, but if she notices one who looks like a stranger and well-to-do, she will give him a coquettish glance and pass on, looking sideways to see if she is followed. If so, she will continue slowly, turning the first quiet street, until the man who follows her has a chance to overtake her. The chances are ten to one that he will address her. She will appear shy at first, and not inclined to speak, but after a short time she will talk, and after some conversation she will convey the idea to the man that she is a married woman; that her husband is out of town and no one is at home. If he will be discreet he may accompany her home, she says, and have a talk. The pair then walk to the house, passing the corner where the male accomplice is lying in wait, and the woman, pulling out her latch-key, will open the door; and the fly is in the parlor of the spider.