
          Cambridge, Mass.
 Feb. 20, 1860 


 My Dear Dr. 


 Whether you can 
 read Boissier's note is very 
 doubtful. But you can 
 read mine to him in reply, 
 and you see what I want 
 you to do, right off, 
 viz. take a copy of text of 
 Mex. Bound. surv. [Mexican Boundary Survey], take out the 
 sheet with contains Euphorbia 
 (all but the tail, which I have copied)
 enclose it in my letter to Boissier, 
 folded to go in, seal & mail. 
 To make sure that it is within
 the ounce which my stamps 
 provide for cut down the margins
 a little, but no more than the binder
 would in binding. And please 
 send the rest to me, in your next 
 parcel, for Boissier, along with 
 another copy for Dr. Canfield, California. 
 When you get the plates, I may as well 
 pay for Boissier's copy. 
        