Hereafter we shall be compelled to acknowledge that the only distinction between species and well-marked varieties is, that the latter are known, or believed to be connected at the present day by intermediate gradations whereas species were formerly thus connected.

At some future period, not very distant as measured by centuries, the civilised races of man will almost certainly exterminate and replace throughout the world the savage races. At the same time the anthropomorphous apes, as Professor Schaaffhausen has remarked, will no doubt be exterminated. The break will then be rendered wider, for it will intervene between man in a more civilised state as we may hope, than the Caucasian and some ape as low as a baboon, instead of as at present between the negro or Australian and the gorilla.

A novel according to my taste, does not come into the moderately good class unless it contains some person whom one can thoroughly love - and if a pretty woman, all the better.

At no time am I a quick thinker or writer: whatever I have done in science has solely been by long pondering, patience and industry.

Language is an art, like brewing or baking.... It certainly is not a true instinct, for every language has to be learnt.

Now when naturalists observe a close agreement in numerous small details of habits, tastes and dispositions between two or more domestic races, or between nearly-allied natural forms, they use this fact as an argument that all are descended from a common progenitor who was thus endowed; and consequently that all should be classed under the same species. The same argument may be applied with much force to the races of man.

Besides love and sympathy, animals exhibit other qualities connected with the social instincts which in us would be called moral.