viii PREFACE 



on the remote islands of St Kilda and Ushant, enabled 

 me to accomplish these objects. 



In addition to other aspects of the subject, attention 

 was devoted to the relations between migrational and 

 meteorological phenomena. In carrying out these par- 

 ticular investigations I was singularly fortunate in enlist- 

 incr the aid of Dr W. N. Shaw, the Director of the 

 Meteorological Office, who has kindly revised the study 

 devoted to Migration-Weather. The series of Charts 

 which so usefully illustrate that study have also been 

 specially prepared by Dr Shaw. 



Several of the studies have appeared in the pages of 

 The Ibis and Reports of the B^Htish Association ; but in 

 each case they have either been largely supplemented by 

 subsequent researches, or carefully revised in the light 

 of further knowledge. 



A number of the stations visited had either never 

 before been explored ornithologically, or only partially 

 so, and as their bird - life is of considerable interest, 

 a complete concise account of their feathered natives is 

 afforded. 



During the many years devoted to this work I was 

 the recipient of many acts of kindness, and have been 

 laid under numerous obligations. For these, gratitude 

 compels me to express my deep sense of the value of the 

 services rendered and my high appreciation of them. 



To Her Grace the Duchess of Bedford, the Elder 

 Brethren of the Trinity House, the Commissioners for 

 Northern Lighthouses, to the late Mr John Bruce 

 of Sumburgh, and Mrs Bruce, Mr Robert Bruce, and 

 the MacLeod of MacLeod, my indebtedness is due 

 for special facilities afforded for carrying out the 

 investigations. 



