The Presidential Address. 91 of the scope of Darwin's other works, this is quite beyond the bounds of possibility on the present occasion.34 The 'Variation of Animals and Plants under Domestication,' the 'Descent of Man,' and the 'Expression of the Emotions,' contain the direct applications of the theory of descent to particular groups of phenomena, and the conclusions arrived at in some of his other books have a certain bearing on this doctrine. The magnitude of his labours can be best esti- mated by striking out from the list which I have given all those works which are directly related to the 'Origin of Species,' and there will even then remain a body of researches which by themselves would be sufficient to have established for Darwin the reputation of being the most active and able observer of our time. Of the personal character of Darwin, everything that can be said by those who knew him has already been expressed, and it is impossible to add anything to the weight of their testimony. By his intimate acquaintances he was venerated, by friend and foe he was alike respected. In conversation, which in later life his health prohibited him from maintain- ing for any length of time, his manner was vivacious and often humorous, his features lighting up with expression and shedding a genial warmth upon his listeners. When speak- ing on subjects that lay beyond the sphere of his own studies he would ask for and receive information with the most profound attention, as though endeavouring to find some bond of connection between facts that were new to him and the already vast store of knowledge upon which he was always able to draw in illustration of his own remarks. He was simplicity personified, and the pretentiousness of professorial dignity was quite foreign to his disposition. He liked to be received in the character of the country squire rather than as the author of the 'Origin of Species.' I remember how 34 An excellent account of Darwin's scientific work appears in the current (January) number of the 'Century,' from the pen of Mr. Wallace. Those who wish to acquire a concise and sound idea of the doctrine of evolution cannot do better than consult Mr. Romanes' little work in 'Nature' Series, Macmillan & Co., 1882.