These are the principal incidents of the trip. We reached our destination in safety, and landed on the superb natural sylvan wall, or park, which is formed by the entrance of Beargrass Creek with the Ohio, just in front of, or a little above, Louisville. Here we sold our boat, took separate lodgings, and parted. I found in a day or two, that my friend from Nancy had a flourishing school for military tactics and the sword exercise, where, at his invitation, I went to visit him. From this man, I learned, as we descended the Ohio, that the _right_ and _left_ banks of a river, in military science, are determined by the supposed position of a man standing at its head, and looking _downwards_. I found in the limestone rocks which form the bed of the river between the town and Corn Island, the cornu ammonis and some other species of organic remains; and while I remained here, which was several weeks, I wrote a notice for one of the papers, of a locality of manganese on Sandy river, Ky., and others of some other objects of natural history in the west, which I perceived, by their being copied at the eastward, were well taken. It was my theory, that there was a general interest felt in the Atlantic States for information from the west, and this slight incident served to encourage me. The steamboat canal since constructed around the falls at this place, was then a project only spoken of, and is here alluded to for no higher purpose than to mention, that in its actual subsequent execution, we are informed the workmen came, at the depth of fourteen feet below the surface of the _calcareous rock_, to a brick hearth, covered with what appeared to be the remains of charcoal and ashes.