Some of the more secluded wharves appear wholly deserted by men and women, and are tenanted alone by rats and boys,--two amphibious races; either can swim anywhere, or scramble and penetrate everywhere. The boys launch some abandoned skiff, and, with an oar for a sail and another for a rudder, pass from wharf to wharf; nor would it be surprising if the bright-eyed rats were to take similar passage on a shingle. Yet, after all, the human juveniles are the more sagacious brood. It is strange that people should go to Europe, and seek the society of potentates less imposing, when home can endow them with the occasional privilege of a nod from an American boy. In these sequestered haunts, I frequently meet some urchin three feet high who carries with him an air of consummate worldly experience that completely overpowers me, and I seem to shrink to the dimensions of Tom Thumb. Before his calm and terrible glance all disguises fail. You may put on a bold and careless air, and affect to overlook him as you pass; but it is like assuming to ignore the existence of the Pope of Rome, or of the London Times. He knows better. Grown men are never very formidable; they are shy and shamefaced themselves, usually preoccupied, and not very observing. If they see a man loitering about, without visible aim, they class him as a mild imbecile, and let him go; but boys are nature's detectives, and one does not so easily evade their scrutinizing eyes. I know full well that, while I study their ways, they are noting mine through a clearer lens, and are probably taking my measure far better than I take theirs. One instinctively shrinks from making a sketch or memorandum while they are by; and if caught in the act, one fondly hopes to pass for some harmless speculator in real estate, whose pencillings may be only a matter of habit, like those casual sums in compound interest which are usually to be found scrawled on the margins of the daily papers in Boston reading-rooms. Our wharves are almost all connected by intricate by-ways among the buildings; and one almost wishes to be a pirate or a smuggler, for the pleasure of eluding the officers of justice through such seductive paths. It is, perhaps, to counteract this perilous fascination that our new police-office has been established on a wharf. You will see its brick tower rising not ungracefully, as you enter the inner harbor; it looks the better for being almost windowless, though beauty was not the aim of the omission. A curious stranger is said to have asked one of our city fathers the reason of this peculiarity. "No use in windows," said the experienced official sadly; "the boys would only break 'em." It seems very unjust to assert that there is no subordination in our American society; the citizens show deference to the police, and the police to the boys.