Families living in the city cannot, of course, know who they are taking into their midst as servants, and it frequently happens that these girls are the confederates of burglars. They come for the purpose of spying out the premises, and from time to time report the internal arrangements to their "men." At the proper moment, the burglar, who has thus acquired a sufficient familiarity with the house, is admitted by the girl. He performs his work sometimes without detection, but sometimes adds murder, or attempts at murder, to his crime. These men are well known to the police, but as they are to be deemed innocent until _proved_ guilty, it is hard, if not impossible, to prevent their crimes. A servant girl is seen in the area, towards evening, with a broom in her hand; by her side is a man who is conversing earnestly with her. The policeman, as he passes along, recognizes him as a notorious burglar. That night the house is broken open and robbed, and perhaps some of the family murdered. The officer knows perfectly well who did it, but this knowledge goes for nothing in law. The man must be regularly tried, and proved guilty. Although the officer feels sure the man and woman are planning a burglary, when he sees them in the area, he cannot prevent it by arresting the man. An incident in point has transpired of late, in illustration of this familiar danger. A gentleman's house, situate on Fifth Avenue, near Thirty-second street, was entered on the night of March 24th, by a brace of burglars, who were, as subsequent investigation proved, admitted at the basement, or servant's entrance, by one of the chambermaids. The burglars succeeded in obtaining a considerable amount of plunder, but were alarmed by the unexpected awakening of some of the inmates of the house, and hastily departed. Suspicion fell upon the delinquent maid, who was examined, confessed her guilt, stated that the principal burglar was her sweetheart, and promised that if she was permitted to escape the deserved public punishment of her crime, she would see that the missing property was restored to its rightful owners. This 'arrangement' was accepted, the girl fulfilled her part of the contract, and every article that had been stolen was promptly restored. The chambermaid was dismissed, and any further prosecution of the affair was summarily closed. In this particular instance, it will be seen that matters terminated favorably, but it would be well if wealthy citizens would be warned against the 'family' risk to which their property is exposed, and led to adopt the most stringent precautions against these dangers, especially when summer pleasures will entice the majority of the votaries of gayety and fashion 'out of town,' leaving their dwellings almost wholly to the 'care' of not always reliable domestics. A HAIR THIEF.