of recognising the real existence and peculiar nature of instinct. It would not do so on account both of man’s highest and of man’s lowest instinctive powers. To speak first of the former: as instinct, such as we have hitherto discovered, is the appointed bridge between mere organic and intellectual animal life, so there is in man a further development of instinct, peculiar to him, and serving to bridge over the gulf between mere intelligent animal faculty and distinctly human reflective intellectual activity. Such special intellectual instinct is that which impels man to the external manifestation by voice or gesture of the mental abstractions which his intellect spontaneously forms, and which are not formed by the lower animals, which give no evidence of this power of abstraction. Language could never have been deliberately invented nor have arisen by a mere accidental individual variation, for vocal and gesture signs are essentially conventional, and require more or less comprehension on the part of those to whom they are addressed as well as on the part of those who use them. Analogous considerations apply to the first beginnings of what cannot be reckoned as merely instinctive activities, but the origins of which must have been akin to instincts. I refer to the beginnings of literature, art, science and politics, which were never deliberately invented. Even men who supposed they were inventing and constructing a certain new order of things with full purpose and much intelligence, have really been all the time so dominated by influences beyond their consciousness, that they really evolved something very different from what they supposed or intended. This fact has been most instructively shown by De Tocqueville and Taine with respect to the men who promoted and carried through the great French Revolution. So much, then, for man’s highest instinctive powers: but our argument has no need to refer to them, for a consideration of man’s lowest instinctive powers alone suffices to show that they cannot be due to “natural selection,” even when aided by “lapsed intelligence.” Can it be for a moment seriously maintained that such actions of the infant as those of the sucking, deglutition, and defecation, or the sexual instincts of later life, ever arose through the accidental conservation of haphazard variations of habit in ancestral animals? If it cannot be maintained, as I am confident it cannot, then it is absolutely impossible successfully to evade the difficulty of the existence of instinct. However far we may put back the beginnings of instinct, the question as to its origin (with its subsequent modifications) ever returns, and indeed with increased importunity. How did the first sentient creatures obtain and swallow their food? How did they first come to fecundate their ova or suitably to deposit them? How did they first effect such movements as might be necessary for their respiratory processes? Wherever such