Origins  selected letters of Charles Darwin 1822-1859/  
edited by Frederick Burkhardt 
 - Cambridge  Cambridge University Press  2008 
 - xxviii, 253p. 
<br/><br/> includes bibliographical references and index 
<br/><br/><label>ISBN: </label>9780521898621 
<br/><br/><label>Subjects--Topical Terms: </label>
<br/><br/><label>Dewey Class. No.: </label>576.82092