Angina pectoris and such minor ailments as are only too likely to afflict a man of sixty-five years and impaired constitution interrupted the progress of reading and writing more and more. Physical exertion, particularly that involved in talking long to many people, now brought on pain and difficulty in breathing. But James still carried himself erect, still walked with a light step, and until a few weeks before his death wore the appearance of a much younger and stronger man than he really was. None but those near to him realized how often he was in discomfort or pain, or how constantly he was using himself to the limit of his endurance. He bore his ills without complaint and ordinarily without mention; although he finally made up his mind to try to discourage the appeals and requests of all sorts that still harassed him, by proclaiming the fact that he was an invalid. As his power of work became more and more reduced, frustrations became harder to bear, and the sense that they were unavoidable oppressed him. When an invitation to deliver a course of lectures on the Hibbert Foundation at Manchester College, Oxford, arrived, he was torn between an impulse to clutch at this engagement as a means of hastening the writing-out of certain material that was in his mind, and the fear, only too reasonable, that the obligation to have the lectures ready by a certain date would strain him to the snapping point. After some hesitation he agreed, however, and the lectures were, ultimately, prepared and delivered successfully. In proportion as the number of hours a day that he could spend on literary work and professional reading decreased, James's general reading increased again. He began for the first time to browse in military biographies, and commenced to collect material for a study which he sometimes spoke of as a "Psychology of Jingoism," sometimes as a "Varieties of Military Experience." What such a work would have been, had he ever completed it, it is impossible to tell. It was never more than a rather vague project, turned to occasionally as a diversion. But it is safe to reckon that two remarkable papers--the "Energies of Men" (written in 1906) and the "Moral Equivalent of War" (written in 1909)--would have appeared to be related to this study. That it would not have been a utopian flight in the direction of pacifism need hardly be said. However he might have described it, James was not disposed to underestimate the "fighting instinct." He saw it as a persistent and highly irritable force, underlying the society of all the dominant races; and he advocated international courts, reduction of armaments, and any other measures that might prevent appeals to the war-waging passion as commendable devices for getting along without arousing it.