
          main tributary of the Colorado of the west. The former
 river [?] in Utah Territory exclusively.  On this line we
 were, I believe, in no instance south of the 38° parallel of
 north latitude.


 The difficulty occurring to me therefore, is whether you supposed
 our collections (from Crutzfeldt's [Kreutzfeldt's] notes) made in "Western Arkansas
 and Western Texas", are meant to say that the plants described
 were also found in those States etc. etc. Supposing your localities
 to refer to our collections above, I at first changed "Western
 Texas or Arkansas" to the Upper waters of the Arkansas river,
 but I am now not quite satisfied that those not
 made a mistake in this particular. If so you can easily
 correct it.  But if [crossed out: the] my first impression was correct, then the
 localities need the change which I had coined nearly through
 before any difficulty occurred to me.


 In your letter of the 17th of Jany. [January] last (forwarding your report)
 you speak of wishing to add [crossed out: or insert] a page to it before printing, 
 if this be still desirable would it not be well to add it before
 printing the small edition referred to?


 The very numerous errors committed by compositors, (and
 persisted in notwithstanding proof corrections in my own
 reports), make it very desirable that this copy should be, as
 far as possible, unmistakably plain and legible: and as you are
 anxious to secure corrections in this respect especially, I will
        