ANNIVERSARY ADDRESS OF THE PRESIDENT. 4 1 



exacting as these duties were. Year after year he betook himself to 

 the Continent and spent his holiday there, usually in enlarging his 

 geological experience by studying in foreign lands, and in totally 

 different surroundings, the questions that occupied so much of his 

 attention at home. In this way, for example, he came to know 

 more of what is called " glacial geology " than any of his contem- 

 poraries, for he had the advantage of being familiar with the 

 problems of ancient and extensive glaciation, as these are mani- 

 fested in Britain, while at the same time he learnt to know by 

 heart the characters and scenery of the living glaciers of Switzer- 

 land. His researches among the Permian rocks of England were 

 supplemented and broadened by his studies of the Kothliegende of 

 Germany. And while following the trail of rocks in other countries, 

 he was never unmindful of the courtesies due to foreign geologists. 

 Pew of his contemporaries had a wider circle of acquaintances 

 abroad. He visited these brethren of the hammer, discussed with 

 them, corresponded with them, and in many instances formed with 

 them close and enduring friendships, as delightful and useful to 

 them as they were to himself. 



His longest journey was that undertaken by him in the year 

 1857> when, as delegate from this Society, he attended the Meeting 

 of the American Association for the Advancement of Science. 

 During that visit, in company especially with his old and beloved 

 friend, W. E. Logan, Director of the Geological Survey of Canada, 

 and with Professor James Hall, of Albany, he saw much of the 

 general geology, and still more of the glaciation, of the jS'orthern 

 States and of Canada. It was the enlarged views of geological 

 questions which such extensive travel enabled him to attain, com- 

 bined with the patient mastery of detail necessitated by the re- 

 quirements of the Survey, which gave his expositions their special 

 charm. 



To enumerate all the Memoirs contributed by our late associate 

 to the literature of his favourite science would lead me far beyond 

 the necessary limits of this notice. But a brief statement of the 

 branches of enquiry under which they may be grouped will serve to 

 show his industry, the breadth of his grasp, and the large debt 

 which British Geology will for ever owe to him. 



Eirst I would place his stratigraphical work, in which his genius 

 as a field-geologist specially shines. Last year, in my Anniversary 

 Address, I took occasion to record my admiration of the way in 

 which, with his colleagues, he unravelled the complicated structure 



