PREFACE. ix 



especially in foreign countries, I have frequently, when de- 

 scribing the treatment of a particular ailment, given several 

 recipes, so that the absence of one or more drugs might 

 not defeat success. In these lists, priority has been accorded 

 to merit, as far as practicable. 



Underneath all the illustrations which are not original, I 

 have named the respective sources from which they were 

 obtained. 



Yew Tree House, Crick, Rugby, 

 I St January, 1903. 



