New York by James Fenimore Cooper. THE increase of the towns of Manhattan, as, for the sake of convenience, we shall term New York and her adjuncts, in all that contributes to the importance of a great commercial mart, renders them one of the most remarkable places of the present age. Within the distinct recollections of living men, they have grown from a city of the fifth or sixth class to be near the head of all the purely trading places of the known world. That there are sufficient causes for this unparalleled prosperity, will appear in the analysis of the natural advantages of the port, in its position, security, accessories, and scale. The State of New York had been steadily advancing in population, resources, and power, ever since the peace of 1785. At that time it bore but a secondary rank among what were then considered the great States of the Confederacy. Massachusetts, proper and singly, then outnumbered us, while New England, collectively, must have had some six or seven times our people. A very few years of peace, however, brought material changes. In 1790, the year in which the first census under the law of Congress was taken, the State already contained 340,120 souls, while New England had a few more than a million. It is worthy of remark that, sixty years since, the entire State had but little more than half of the population of the Manhattanese towns at the present moment!