, 

 lllf 



PREFACE 



TO 



NEW IMPRESSION 



OWING to the persistent international complications, we have 

 not been able to complete the records which would justify our 

 publishing a No. 4 of our series of ' Researches.' 



As a new impression of the original work is being called 

 for, we take this opportunity of adding, as a supplementary 

 chapter, a few notes on recent and current researches. 



3-4 NEW COURT, LINCOLN'S INN, LONDON, W.C 

 January 1918. 



