The latter appeared towards the end of November. Copies were sent, among others, to Charles Darwin and to Prof. Ramsay, whose letters in reply were a source of great gratification to James Geikie. Darwin wrote both immediately upon receipt, and later after he had read the book. In the second letter he says:--“Yours is a grand book, and I thank you heartily for the instruction and pleasure it has given me.” That this was not mere flattery is apparent from the keen discussion of certain special points in which he was interested. The next year, 1881, was one of great stress, though the tale of its external events is soon told. That Prof. Ramsay’s health was failing had long been known, and though his actual resignation did not take place till the end of 1881, the fact that it was impending was obvious long before. It was also known among the Survey men that his retiral would mean extensive changes, likely to affect directly and indirectly most of the members of the staff. As has been already stated, it led to James Geikie’s resignation and his acceptance of the professorship at Edinburgh University. Something must therefore be said in regard to the reasons that induced him to leave highly congenial work for a post which was not, certainly at first, wholly so, and which further, at least in early days, did not materially improve his financial position. It must be noted first that by this time he was the author of two bulky books (produced, as we have seen, at the cost of great and continuous toil) which had been hailed at home and abroad as “epoch-making.” He had correspondents in most parts of the civilised world; men of mark in their own countries had publicly acknowledged him as a leader of geological thought, a fount of inspiration, an opener up of new paths of research. At the same time, to those immediately above him he was a subordinate, with a very moderate salary, a recipient of orders, with little opportunity for initiating changes or improvements, and was living in a small provincial town, to some extent remote from the main current of public life.