
          New Haven Nov. 25th 1819.


 [Respected?] Sir,


 I receive[d] your letter of last August
 only a few days before I left N. Haven in Sept. and
 on Several accounts have delayed to answer it till
 now. You will accept my sincere thanks for
 the information you give respecting the Potentilla
 pennsylvanica. I have no doubt you are correct in
 your explanations: but might not the descriptions
 of the plant in the books to be corrected? Such corrections
 however we who are tyros in botany shall
 leave to such men as yourself.


 I just returned from Deerfield and have
 brought along a box of plants from Dr Cooley for
 you - and I shall forward it by the Steam
 boat tomorrow (Friday) evening, or next Monday.
 You will find 91 specimens in the box that I
 put there - of such species as I did not know or
 felt uncertain about. If however it be asking too
 much of you to request you to name them I hope
 you will neglect them as they are not in general 
 of any great consequences. Dr Cooley has made a more
 extensive collection of Cryptogamous plants than
 myself and indeed I found on my return to Deerfield
 that the worms had destroyed a great part of my collection
 so that I have left this department with Dr Cooley.

        