A NEW LITERARY CENTER.—We have seen that Massachusetts supplied the majority of the colonial writers before the French and Indian War. During the next period, Philadelphia came to the front with Benjamin Franklin and Charles Brockden Brown. In this third period, New York forged ahead, both in population and in the number of her literary men. Although in 1810 she was smaller than Philadelphia, by 1820 she had a population of 123,706, which was 15,590 more than Philadelphia, and 80,408 more than Boston.