The Police Headquarters of the Metropolitan District are located in a handsome marble building, five stories high, situated on Mulberry Street, between Houston and Bleecker Streets. The building is fitted up with great taste for the express accommodation of the business of the force. The greatest order prevails. Every thing is in its place, and every man in his. There is no confusion. Each department has its separate room. The Superintendent's office is connected by telegraph with every precinct in the entire district. By means of this wonderful invention a few seconds only are required to dispatch the orders of "King Kennedy" to any part of the district. News of a robbery and description of the burglar are flashed all over the city and adjoining country before the man has fairly secured his plunder. If a child is lost a description is sent in the same way to each precinct, and in a marvellously quick time the little one is restored to its mother's arms. By means of his little instrument, "King Kennedy" can track a criminal not only all over his own district, but all over the Union. He is firm in the exercise of his authority--often harsh and too impulsive, but on the whole as just as human nature will allow a man to be. [Illustration: A Model Policeman.] THE TRIAL ROOM. One of the most interesting rooms in the headquarters is that for the trial of complaints against members of the force. Every sworn charge is brought before Commissioner Acton? who notifies the accused to appear before him to answer to it. Except in very grave cases, the men employ no counsel. The charge is read, the Commissioner hears the statements of the accused, and the evidence on both sides, and renders his decision, which must be ratified by the full "Board". The majority of the charges are for breaches of discipline. A patrolman leaves his beat for a cup of coffee on a cold morning, or night, or reads a newspaper, or smokes, or stops to converse while on duty. The punishment for these offences is a stoppage of pay for a day or two. First offences are usually forgiven. Many well-meaning but officious citizens enter complaints against the men. They are generally frivolous, but are heard patiently, and are dismissed with a warning to the accused to avoid giving cause for complaint. Thieves and disreputable characters sometimes enter complaints against the men, with the hope of getting them into trouble. The Commissioner's experience enables him to settle these cases at once, generally to the dismay and grief of the accuser. Any real offence on the part of the men is punished promptly and severely, but the Commissioners endeavor by every means to protect them in the discharge of their duty, and against impositions of any kind. Another room in the headquarters is called THE PROPERTY ROOM.