viii PREFACE 



Robert Ginsburg of the Marine Laboratory, University of 

 Miami, and Dr. Virgil G. Sleight of the Geology Department 

 of the University of Miami, for critically reading the manu- 

 script. 



Professor Robert G. Albion of the Harvard History Depart- 

 ment has made extremely helpful suggestions in regard to the 

 historical matter but is in no way responsible for our opinions 

 or judgments, which have been governed by the particular 

 focus of this book where much, of necessity, has been omitted. 



We are also indebted to Colonel and Mrs. Frederick A. 

 Wanklyn whose gracious hospitality in Nassau, Bahamas, pro- 

 vided the necessary seclusion from a busy life in which the 

 first few chapters and outline of the book could be written. 



H,C. and F.G.W.S. 

 MIAMI, January, 1952 



