When I was honoured by the invitation to deliver this course of lectures, I did not accept without some hesitation. I am not qualified to speak with authority upon such subjects as have been treated by my predecessors--the course of political events or the growth of legal institutions. My attention has been chiefly paid to the history of literature, and it might be doubtful whether that study is properly included in the phrase 'historical.' Yet literature expresses men's thoughts and passions, which have, after all, a considerable influence upon their lives. The writer of a people's songs, as we are told, may even have a more powerful influence than the maker of their laws. He certainly reveals more directly the true springs of popular action. The truth has been admitted by many historians who are too much overwhelmed by state papers to find space for any extended application of the method. No one, I think, has shown more clearly how much light could be derived from this source than your Oxford historian J. R. Green, in some brilliant passages of his fascinating book. Moreover, if I may venture to speak of myself, my own interest in literature has always been closely connected with its philosophical and social significance. Literature may of course be studied simply for its own intrinsic merits. But it may also be regarded as one manifestation of what is called 'the spirit of the age.' I have, too, been much impressed by a further conclusion. No one doubts that the speculative movement affects the social and political--I think that less attention has been given to the reciprocal influence. The philosophy of a period is often treated as though it were the product of impartial and abstract investigation--something worked out by the great thinker in his study and developed by simple logical deductions from the positions established by his predecessors. To my mind, though I cannot now dwell upon the point, the philosophy of an age is in itself determined to a very great extent by the social position. It gives the solutions of the problems forced upon the reasoner by the practical conditions of his time. To understand why certain ideas become current, we have to consider not merely the ostensible logic but all the motives which led men to investigate the most pressing difficulties suggested by the social development. Obvious principles are always ready, like germs, to come to life when the congenial soil is provided. And what is true of the philosophy is equally, and perhaps more conspicuously, true of the artistic and literary embodiment of the dominant ideas which are correlated with the social movement.