Phila. May 1. 1828
Although it is now some years since I had the pleasure of seeing you at Montpelier, I assure you, I have never forgotten the kindness and hospitality with which you treated me on that occasion.
I have only written once since that period, because I was fearful of trespassing on your retirement, & on that valuable time, which is occupied with more important concerns.
Since I was in Virginia, I have delivered several courses of lectures in chemistry, and mineralogy, in various towns, and have published a few essays in the American Journal of Science. Some of these would not have interested you, but I have recently written one on the Boundaries of Empires in which I attempt to prove that Nature has erected barriers on the surface of the Earth, which nations can seldom pass with impunity.
As every subject connected with the Philosophy of History will, I am sure, interest you, who have devoted so much time to its investigation, I submit this essay to your judgment & should consider your opinion as of very great value.
I beg to present my respects to Mrs Madison, and to assure you how sincerely I subscribe myself, your most faithful, and obedient Servant.
RC (DLC). Docketed by James Madison.