Aristotle--proved to be impossible within the limits of the History. When, however, the promised work appeared, after nine laborious years, it was found to compass only Plato and the other immediate companions of Sokrates, leaving a full half of the appointed task unperformed. Mr. Grote had already passed his 70th year, but saw in this only a reason for turning, without a moment's pause, to the arduous labour still before him. Thenceforth, in spite of failing strength and the increasing distraction of public business, he held steadily on till death overtook him in the middle of the course. What he was able to accomplish, though not what study he had gone through towards the remainder of his design, these volumes will show. The office of preparing and superintending their publication was entrusted to the present editors by Mrs. Grote, in the exercise of her discretion as sole executrix under his last Will. As now printed, the work has its form determined by the author himself up to the end of Chapter XI. The first two chapters, containing a biography of Aristotle and a general account of his works, are followed by a critical analysis, in eight chapters, of all the treatises included under the title 'Organon;' and in the remaining chapter of the eleven the handling of the Physica and Metaphysica (taken together for the reasons given) is begun. What now stand as Chapters III., IV., &c., were marked, however, as Chapters VI., VII., &c., by the author; his design evidently being to interpolate before publication three other chapters of an introductory cast. Unfortunately no positive indication remains as to the subject of these; although there is reason to believe that, for one thing, he intended to prefix to the detailed consideration of the works a key to Aristotle's perplexing terminology. Possibly also he designed to enter upon a more particular discussion of the Canon, after having viewed it externally in Chapter II.; citations and references bearing on such a discussion being found among his loose notes.