‘This passage descends very rapidly, and is, I should suppose, about sixty yards long. Towards the end it narrows considerably, and terminates in a pool of clear water, about three or four feet deep. How far this pool extends, it is impossible to say. A canoe was once brought down by a party for the purpose of examination, but they said, that after proceeding a little way the canoe would not float, and they were forced to return. Their fears most probably led them to fancy so. I fired a pistol with a ball over the water, but the report was echoed from the after part of the cavern, and not from the part beyond the water, so that I should not suppose the passage extended much farther than could be traced with the eye. The walls of this passage consist of a solid rock of limestone on each side, which appears to have been separated by some convulsion. The floor is of a deep sandy earth, and it has repeatedly been dug up for the purpose of getting salt-petre, with which the earth is strongly impregnated. The earth, after being dug up, is mixed with water, and when the grosser particles fall to the bottom, the water is drawn off and evaporated; from the residue the salt-petre is procured. There are many other caverns in this neighborhood; and also farther to the westward in Virginia; from all of them great quantities of salt-petre are thus obtained. The gunpowder made with it, in the back country forms a principal article of commerce, and is sent to Philadelphia in exchange for European manufactures. ‘About two thirds of the way down this long passage just described, is a large aperture in the wall on the right, leading to another apartment, the bottom of which is about ten feet below the floor of the passage, and it is no easy matter to get down into it, as the sides are very steep and extremely slippery. This is the largest and most beautiful room in the whole cavern; it is somewhat of an oval form, about sixty feet in length, thirty in breadth, and in some parts nearly fifty feet high. The petrifactions formed by the water dropping from above are most beautiful, and hang down from the ceiling in the form of elegant drapery, the folds of which are similar to what those of large blankets or carpets would be, if suspended by one corner in a lofty room. If struck with a stick, a deep hollow sound is produced, which echoes through the vaults of the cavern.