Salt River is between 100 and 150 yards wide where it unites with the Ohio, and is navigable for about sixty miles. The name is derived from salt springs in its vicinity that are now wrought. Opposite to the mouth of this river, on the north {259} bank of the Ohio, stands a sycamore tree of stupendous size, which is hollow within. I measured the cavity, and found one diameter to be twenty-one feet, and the other twenty feet. In one side of it, a hole is cut sufficiently large to admit a man on horseback. It was probably a sycamore considerably less than this that is noticed in the Pittsburg Navigator, (edition printed in 1818, p. 29,) in the following words: -- “There is one of these huge trees in Sciota county, Ohio, on the land of a Mr. Abraham Miller, into whose hollow thirteen men rode on horseback, June 6, 1808; the fourteenth did not enter, his horse being skittish, and too fearful to advance into so curious an apartment, but there was room enough for two more.” [140] There is perhaps no vegetable in this country that strikes the mind with greater surprise than the wild vine. I have seen one with a stem nine inches in diameter, and heard of others measuring eleven inches. Some detached trees have their tops closely wreathed with the vines in a manner that forms an elegant and umbrageous canopy, into which the eye cannot penetrate. In the woods they overtop the tallest trees, and from thence hang their pendulous twigs almost to the ground, or pass their ramifications from the branches of one tree to others, overshadowing a considerable space. In many instances their roots are at the distance of several feet from any tree, and their tops attached to branches at the height of sixty or eighty feet, without coming into contact with the trunks of trees, or any other intermediate support. To make the case plain, I have only to say, that the positions of some of these vines have a near resemblance to the stays, and some other ropes of a ship. The question, how they have erected themselves in this manner? is frequently put. Boats that descend the {260} Ohio are often moored without any other cable than a small vine. If a notch is cut in the stem of a vine in the spring season, clear and tasteless water runs out, not in drops, but in a continued stream. I have several times quenched my thirst from sources of this kind.