The year 1857 was a remarkable one in the history of New York City, and indeed of the whole country. The year previous had been characterized by intense political excitement, for the presidential campaign had been carried on as a sectional fight or a war between the upholders and enemies of the institution of slavery as it existed at the South. Pennsylvania alone by her vote defeated the antislavery party, and the South, seeing the danger that threatened it, had already begun to prepare for that tremendous struggle, that afterwards tested to the utmost the resources and strength of the North; while a financial storm overwhelmed the entire country in disaster. To these were added local causes, which affected New York City particularly, and made it a year of uncommon disturbance. The Republican party being largely in the ascendant in the State, determined to revolutionize the municipal government, and place the Democratic city partially under Republican rule. Many bills were passed during the session of Legislature, peculiarly obnoxious to the city authorities, but that which excited the most bitter opposition was called the Metropolitan Police Act, by which the counties of New York, Kings, Westchester, and Richmond were made one police district, to be controlled by a board of commissioners, consisting of five members appointed by the Governor and Senate, and to hold office for five years. This board having organized, proceeded to create a police department. Mayor Wood denied the constitutionality of the act and retained the old police--so that there were two police departments existing at the same time in the city. The Mayor resorted to all kinds of legal measures to defeat the action of the board, and the question was finally referred to the Court of Appeals for decision.