latter chapters of this volume, seemed to throw some light on the origin of species—that mystery of mysteries, as it has been called by one of our greatest philosophers. On my return home, it occurred to me, in 1837, that something might perhaps be made out on this question by patiently accumulating and reflecting on all sorts of facts which could possibly have any bearing on it. After five years’ work I allowed myself to speculate on the subject, and drew up some short notes; these I enlarged in 1844 into a sketch of the conclusions which then seemed to me probable: from that period to the present day I have steadily pursued the same object. I hope that I may be excused for entering on these personal details, as I give them to show that I have not been hasty in coming to a decision.”
If he hopes finally to solve his great problem, it is by careful experiments in pigeon fancying, and other sorts of artificial variety making. His hero is not a self-inclosed, excited philosopher, but “that most skilful breeder, Sir John Sebright, who used to say, with respect to pigeons, that he would produce any given feathers in three years, but it would take him six years to obtain a head and a beak.” I am not saying that the new thought is better than the old; it is no business of mine to say anything about that; I only wish to bring home to the mind, as nothing but instances can bring it home, how matter-of-fact, how petty, as it would at first sight look, even our most ambitious science has become.
In the new communities which our emigrating habit now constantly creates, this prosaic turn of mind is inten-
