I allude to the expedition from Detroit in
1820, under General Cass.
I had, at this time, personally visited every mine or digging of
consequence in the Missouri country, and had traced its geological
relations into Arkansas. I was engaged on this paper assiduously. When
it was finished, I read it to persons well acquainted with the region,
and sought opportunities of personal criticism upon it.
The months of February and March had now glided away. Too close a
confinement to my room, however, affected my health. The great change of
life from camping out, and the rough scenes of the forest, could not
fail to disturb the functional secretions. An obstruction of the liver
developed itself in a decided case of jaundice. After the usual
remedies, I made a journey from Potosi to the Mississippi River, for
the purpose of ascending that stream on a barge, in order that I might
be compelled to drink its turbid, but healthy waters, and partake again
of something like field fare. The experiment succeeded.
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