FOREWORD 
Tus book was written in 1913, and corrected for press at 
Lanchou-fu, Kansu, China, during the winter of 1914. The 
exigencies of war have delayed its appearance ever since, and 
also even now prohibit such perpetual re-settings of its type 
as would be necessary to bring it completely abreast of the 
most recent discoveries and diagnoses. And I particularly 
regret that the delay in its appearance has outlasted the life 
of Mr. R. Hooper Pearson, to whom it owes its inception, 
He died on June 11, 1918, and I wish here to put on record 
my own special expression of grief and gratitude to one who 
was always a good friend to me, and, in particular, shouldered 
the chief burden and labour of producing this book, which, 
alas! he has not lived to see completed. 
R. F. 
November 1, 1918. 
AN GA 
jv Lo 
WD = 
