--"I am much obliged to you for your
kind intention of furnishing me with a paper on the impressions in
limestone, and I hope you will bear it in mind, and execute it
accordingly.
"I have observed the appointment which the newspapers state that you
have received from the government, and regret that it carries you so far
south,[11] into an unhealthy climate; wishing you, however, health and
leisure to pursue those studies which you have hitherto prosecuted so
successfully."
[Footnote 11: This is evidently an allusion to St. Mary's, in Georgia,
instead of Michigan.]
Professor Frederick Hall, of Middlebury College, addresses me (Jan.
14th) on the same subject. He alludes to my treatise "On the Mines,
Minerals, &c., of the western section of the United States;" a work for
which our country and the world are deeply indebted to your enlightened
enterprise and unrelaxing zeal. Before reading it, I had a very
inadequate conception of the actual extent and riches of the lead mines
of the West.
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