
          Recd & Ansd July 31                       West Chester, Pennsylvania July 26. 1841


           Dear Sir,


                              I was on the point of writing to
 Dr. Gray, a few weeks ago, when I learnt from Mr. Durand
 that he had gone on an excursion to the mountains
 of Carolina.  I suppose he has not yet returned; and
 I therefore beg leave to trouble you on a matter in
 which I am much interested at present.  Dr. G. in:
 formed me, early in the spring, that he had ordered
 a complete copy of Endlicher's Genera for me,
 and that it might be expected in a few weeks.
 My object now is, to inquire whether you know
 any thing of its arrival; and if it should have
 reached New York, to ask the favor of you to cause
 it to be forwarded to Carey & Harts, Philadelphia
 by the earliest safe conveyance.  I am engaged
 at present, in revising our Herbarium, & arranging
 the plants, according to Endlicher.  I have only
 received the first eight numbers of the work
 & shall soon be through with my task, as far
 as those eight nos. extend.  I am therefore very
 desirous to possess the entire work.  If it has not
 yet come, & do not arrive until Dr. Gray returns,
 you will oblige me much by reminding the Dr.
 of the subject, & requesting him to send it on
 as soon as it comes to hand.  I wish him, also to
 send a bill of the cost along with the book, so
 that I may leave the amount, subject to his order
 with Carey & Hart.  I am very much pleased with
 Endlicher's arrangement.  I think he has been very
 successful in grouping plants according to their
 most striking affinities: and as his work will probably
 become the standard for the next generation of Botanists,
 I think it desirable that his Genera should be

        