
          Washington D.C.
 April 10th 1855.


 Professor Jno. Torrey
 96 St Marks Place
 N.Y.


 Dear Sir:


 It was suggested 
 to me yesterday as being desirable, if possible,
 to have your report (now in my hands) printed 
 with the octavo 1.500 copy edition of the concluding 
 portion of the rail road matter of my report, which
 it is said, is about to be put to press, in order to secure
 the correction of any errors which, notwithstanding the
 proof corrections, may be retained in this small 
 edition.  This, if done, may [?] secure the 
 large edition (20.000??to.) which will be accompanied
 by the illustrations (which, of course cannot accompany
 the one it is now proposed to finish) against errors which
 otherwise be unavoidable in the [?ghing] execution 
 to which the public printing is here subject. In the correction
 of errors in the names of [?] introduced by the
 collector when collections were made, I have formed a little

        