
          Troy. April 25th 1820

Dear friend,

I have been engaged with my
Geology, which I shall send you when it
is finished, for several weeks. It is printed
as far as 226 pages, all of which I have
sent to Col. Gibbs, to the care of Mr. Wm.{William]
Simmonds, [?] Market. With the first package
I sent the forms of two plans of a dedication; 
because I wish to dedicate it to
him by permission. I mentioned you in
my letter, as the medium through which
I might receive his permission.

Now attend to this. I must set out
on my itinerarating course next week. The
book will be finished, excepting the title,
preface &c.[etc.] next Friday. You see I am
pressed to narrow limits. Will you call
on Col.mGibbs in one hour after receiving
this, and then return home and answer
me the same day by mail. I wrote him
that I should request you to call on him,
        