It may be noted here that the fact that Dr Horne had for many years been living in Edinburgh explains the absence of letters in later years, for personal intercourse had taken the place of correspondence. Dr Horne retired from the Geological Survey in this year of 1911, and in a letter to Prof. Stevenson, Prof. Geikie speaks of a dinner given to him by present and former colleagues on the occasion of his retiral. Writing in March, he says:--“Last night Dr Horne (Geol. Survey) was entertained by his present and former colleagues. My brother, wonderfully hale and hearty, was in the Chair. Horne retires from the Survey in June. It seems a short time ago when he first started work in the Survey as a lad under my guidance. But upon reflection I see the ‘short time’ = 44 years! When I think of it, old age seems to have come upon me all at once.” Other incidents of 1911 were a spring holiday in Devonshire and a summer one in Switzerland, while in autumn Prof. and Mrs Geikie were at the Centenary celebrations at St Andrews University. Of these, Prof. Geikie sends a lively description to his daughter. He enjoyed the proceedings very much on the whole, but found many of the meetings and entertainments too long for his taste and strength. Of one dinner he complains that the speakers “not only exhausted time but encroached upon eternity.” Towards the end of the year, now that the question of resignation was beginning to demand an early decision, Prof. Geikie resolved to present to the University the large collection of books and pamphlets which he and his brother Sir Archibald had made for the use of the students of the geological classes. A letter from the Secretary of the University Court, written at the close of December, says:--“The Court desires me to communicate to you, and through you to your brother, Sir Archibald, in conjunction with whom this valuable collection of scientific works was made, their most cordial thanks. The loyalty to ‘Alma Mater,’ on the part of Sir Archibald and yourself, has been warmly appreciated by the Court.” The chief incident of 1912 was a visit to London to take part in the celebrations of the 250th anniversary of the Royal Society, of which his brother, Sir Archibald, was president. In the following year Prof. Geikie was elected President of the Royal Society of Edinburgh, an honour of which he was very proud. He held this position while his brother was still President of the London Society--a somewhat remarkable coincidence. In writing to congratulate him on the appointment, Sir Archibald says:--“I hope it will not give as much work and worry as my Chair here has given me.”