
          Cambridge, March 21st '50 [1850].


 Dear Doctor, 


 I have had no 
 answer to my two last letters, 
 the last went to Princeton 
 where I suppose you must 
 be. 


 Sprague wants a better 
 specimen [added: than mine] & sterile flowers of 
 Hymenoclea.


 When you send that I 
 should be glad if you will 
 send me good specimens of
 AEsculus flava in flower to 
 be drawn. 


 Pray tell me shall I send 
 you a package containing some 
        