It was during the ten years that now occurred that he mainly acquired that store of facts which were the foundation of his future speculations. His pen was never idle, but it was to note and to register, not to compose. His researches were prosecuted every morning among the MSS. of the British Museum, while his own ample collections permitted him to pursue his investigation in his own library into the night. The materials which he accumulated during this period are only partially exhausted. At the end of ten years, during which, with the exception of one anonymous work, he never indulged in composition, the irresistible desire of communicating his conclusions to the world came over him, and after all his almost childish aspirations, his youth of reverie and hesitating and imperfect effort, he arrived at the mature age of forty-five before his career as a great author, influencing opinion, really commenced. The next ten years passed entirely in production: from 1812 to 1822 the press abounded with his works. His "Calamities of Authors," his "Memoirs of Literary Controversy," in the manner of Bayle; his "Essay on the Literary Character," the most perfect of his compositions; were all chapters in that History of English Literature which he then commenced to meditate, and which it was fated should never be completed. It was during this period also that he published his "Inquiry into the Literary and Political Character of James the First," in which he first opened those views respecting the times and the conduct of the Stuarts, which were opposed to the long prevalent opinions of this country, but which with him were at least the result of unprejudiced research, and their promulgation, as he himself expressed it, "an affair of literary conscience."[3]