It is pretty clear that Thucydides spent a large part of a life of about threescore years and ten in gathering materials and writing his history. The mass of facts which he set down or stored away in his memory must have been enormous. He was a man of business, and had a home in Thrace as well as in Athens, traveling probably at fairly frequent intervals between the two places; but the main portion of the first forty years of his life was undoubtedly spent in Athens, where, during those glorious years of peace and the process of beautifying the city, he received the best education a man could get. To walk about the city and view the buildings and statues was both directly and insensibly a refining influence. As Thucydides himself, in the funeral oration of Pericles, said of the works which the Athenian saw around him, "the daily delight of them banishes gloom." There was the opportunity to talk with as good conversers as the world has ever known; and he undoubtedly saw much of the men who were making history. There was the great theater and the sublime poetry. In a word, the life of Thucydides was adapted to the gathering of a mass of historical materials of the best sort; and his daily walk, his reading, his intense thought, gave him an intellectual grasp of the facts he has so ably handled. Of course he was a genius, and he wrote in an effective literary style; but seemingly his natural parts and acquired talents are directed to this: a digestion of his materials, and a compression of his narrative without taking the vigor out of his story in a manner I believe to be without parallel. He devoted a life to writing a volume. His years after the peace was broken, his career as a general, his banishment and enforced residence in Thrace, his visit to the countries of the Peloponnesian allies with whom Athens was at war,--all these gave him a signal opportunity to gather materials, and to assimilate them in the gathering. We may fancy him looking at an alleged fact on all sides, and turning it over and over in his mind; we know that he must have meditated long on ideas, opinions, and events; and the result is a brief, pithy narrative. Tradition hath it that Demosthenes copied out this history eight times, or even learned it by heart. Chatham, urging the removal of the forces from Boston, had reason to refer to the history of Greece, and, that he might impress it upon the lords that he knew whereof he spoke, declared, "I have read Thucydides."