
          Cambridge, Mass. May 10th 1866.


 Dr. John Torrey,


 Dear Sir,


 When I had
 the pleasure of seeing you
 last winter, I believe we
 spoke about an exchange of
 some of my Hawaiian Plants
 for some of the Texan &
 New Mexican collections.
 If it is still your pleasure to
 make such an exchange, I 
 should be very glad indeed
 to do my part in it.


 I am at present, in fact
 shall be through the year, engaged
 on my Hawaiian Plants,
 and what others I can find in
 Dr. Gray's herbarium, in preparing
  
        