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 upon her sharing his feeling, that he is bound for his own credit, for the sake of his friends and of science itself, to keep his hand to the plough. How his persistence was rewarded, how he gradually emerged, secured in spite of vexatious delays a sufficient support to justify the long-delayed marriage and to carry on the task which he had accepted, may be read in these volumes. In later years, the duties of a husband and a father forced him to give up the line of research to which he had aspired. But he was not less working in the great cause of propagating what he believed to be the truth: fighting its enemies and organising its adherents. He was 'driven into his career,' as he says in his autobiography, rather than led into it of his own free will. Yet the dominant purpose was equally manifest, though stress of circumstances and conflict of duties might force him to set his sails to devious winds. If he could not select the career which ambition of purely scientific fame might have dictated, he would accept none which involved the slightest compromise with falsehood; and probably took, in fact, the part most suitable to his peculiar cast of intellect. When Huxley took up the gauntlet for Darwinism, and first became widely known to