
          Mr John Smith's system in the arrangement of our ferns, 
and such being the case, you will by turning to Hooker's 
Jour [Journal] of Botany, Vol. 4th find that he has made 
a great many new genera, out of the old. do you think
it necessary for me to give his Generic descriptions? and
should I have occasion to add to any of them, 
be kind enough to give him the form for the same.

I have now imported a copy of Presl Tentamen Pteredographiae [Pteridographiae].
It contains many good ideas, and just 
about as many hair splitting generic distinctions, but 
with all it is an invaluable Book.

I like Dr Grays text-Book on Northerns Bot [Botany?] 
very much. it is just the very thing wanted.

What progress are you making with the 
Oregon plants? I have heard nothing more about the
Kooskooskie collection, do keep the ball a rolling.

Captain Wilkes is expected home sometime next 
week. I hope you have, or will see him before his 
return.

With best wishes for yourself and family, 
and expecting to hear from you soon, I remain

Yours very respectufully

Wm [William] D. Brackenridge.
        