DEDICATION 



This short course of lectures on a great theme is a centenary 

 tribute to Charles Darwin, but I wish also to ask the many 

 friends whh made me no stranger in their country — men and 

 women of diverse opinions, at one however in their evolu- 

 tionist outlook and in their good-vjill — to lay it on the 

 threshold of United South Africa, Quod bonum, felix 

 fauatwmque sit I 



