
          Troy Jan 12th, 1822.


 Dear friend, 


 I recd. yours of the 26th inst. postmarked
 8th inst. this afternoon.


 The Manual will be out soon. Webster are now
 at work, all hands. I intended to have you tell me
 about a Riccia, which I [word obscured by stamp!--found?] in your De
 Candolle & De La Marck at the word Riccia, but
 I forgot to write about it. Look at it more.
 I have passed Riccia, but I can correct it
 in my Addenda. I have called it crystallina,
 because I can find no other description that
 will not exclude it. But Dewey says he has
 one like it, which you call trifulca [?]. I have
 no description of trifulca. Send me its name
 and a specific description immediately, if it is
 not crystallina. It grows in a pond in Wallingford,
 Vermont. At the same time send me any
 errors you have noticed in what you received
 of this edition.


 About the preface-- I will here send [added: a copy of] all I
 say about you. I talk about two pages of the
 improvement in this edition in a very plain way [added: without speaking of you.]
 Then I begin a new paragraph in this way-- 


 Here I might leave the reader with a sufficient
 view of the improvements attempted; and with an imprecision
 favorable to my industry. But I am
 compelled to acknowledge, that though I have done
 all in my power, I can claim as my own but
 a small proportion of the improvements, excepting as it respects localitites. Dr. Torrey of N. York
 [crossed out: ? his indefatiguable ? and directness the signature] suggested
 the [added: most] valuable [added: corrections and] improvements to be found in this
 edition. And I believe I may encourage the reader
 with the hope, that the extensive collection of material
        