I do not think geologists who have studied the Himalayas will be disposed to agree with Mr. Howorth (ante, pp. 97–104, 156–163) that those mountains have come into existence since the time when the Mammoth flourished in Siberia. It is quite possible that the Himalayas are higher now than they were in Pliocene or even in Pleistocene times; but the geological evidence, so far as it is known, is, I think, in favour of the view expressed by Mr. R. D.