PREFACE vii 



largely was he instrumental in their development, that 

 the chronicle of his life is in great measure the record 

 also of the progress of that branch of the public 

 service. Recognising this intimate relation, I have 

 woven into my narrative such additional detail as 

 might perhaps serve to make the volume not only a 

 personal biography, but an outline of the history of the 

 Geological Survey of the United Kingdom. 



Among those who have kindly supplied me with 

 letters or information I would especially express 

 my indebtedness to Lady Ramsay and Sir Andrew 

 Ramsay's nephew, Professor William Ramsay, F.R.S., 

 who have furnished many family and personal details ; 

 and to Mrs. Johnes and Lady Hills-Johnes of Dolau- 

 cothy, who have lent a large collection of letters. Old 

 colleagues on the Geological Survey have likewise 

 been helpful, especially Lord Playfair, Mr. W. T. Ave- 

 line, Mr. A. R. C. Selwyn, Professor T. M 'Kenny 

 Hughes, Professor A. H. Green, Mr. H. H. Howell, 

 Mr. W. Whitaker, Mr. F. W. Rudler, Mr. A. Strahan, 

 and the late Mr. W. Topley. Mr. M. J. Salter has 

 lent a number of letters addressed to his father. To 

 some of Sir Andrew's foreign correspondents I am 

 likewise under obligation, particularly to Professor 

 Zirkel, Professor Daubree, Professor Rlitimeyer, Pro- 

 fessor Capellini, and the family of Signor Sella. 



It has seemed to me that additional interest would 

 be given to the biography by the insertion not only of 



