PREFACE 



This brief study in evolution 

 appeared first about a year ago as 

 an introduction to a revival of the 

 story of George Croly's "Sala- 

 thiel," rechristened "Tarry Thou 

 Till I Come." 



The study has been so favorably 

 received by some whose judgment 

 I esteem that I have ventured to 

 recast it somewhat, enlarging it 

 here and there, and to send it 

 abroad in its present form., 



