September 15.--We first attempted the pass nearest to us, and which was reported to be practicable. The horses with tolerable ease descended the first ridge, which was about one third down; but it was impossible to proceed a step farther with them: indeed we had the utmost difficulty to get them back again. Three of them actually rolled over, and were saved only by the trees from being precipitated to the bottom. Quitting this place, we proceeded up the glen, into which many small streams fell from the most awful heights, forming so many beautiful cascades. After travelling five or six miles, we arrived at that part of the river at which, after passing through a beautiful and level though elevated country, it is first received into the glen. We had seen many fine and magnificent falls, each of which had excited our admiration in no small degree, but the present one so far surpassed any thing which we had previously conceived even to be possible, that we were lost in astonishment at the sight of this wonderful natural sublimity, which perhaps is scarcely to be exceeded in any part of the eastern world. The river, after passing through an apparently gentle rising and fine country, is here divided into two streams, the whole width of which is about seventy yards. At this spot, the country seems cleft in twain, and divided to its very foundation: a ledge of rocks, two or three feet higher than the level on either side, divides the waters in two, which, falling over a perpendicular rock two hundred and thirty-five feet in height, forms this grand cascade. At a distance of three hundred yards, and an elevation of as many feet, we were wetted with the spray which arose like small rain from the bottom: the noise was deafening; and if the river had been full, so as to cover its entire bed, it would have been perhaps more awfully grand, but certainly not so beautiful. After winding through the cleft rocks about four hundred yards, it again falls in one single sheet upwards of one hundred feet, and continues in a succession of smaller falls about a quarter of a mile lower, where the cliffs are of a perpendicular height, on each side exceeding one thousand two hundred feet, the width at the edges about two hundred yards. From thence it descends as before described until all sight of it is lost, from the vast elevation of the rocky hills which it divides and runs through. The different points of this deep glen seem as if they would fit into the opposite fissures which form the smaller glens alternately on either side. The whole is indeed a grand natural spectacle, and is an indubitable mark of the vast convulsions which this country must at one period have undergone. The rocks are all slate, the upper romanae of which are of a light brown colour, rotten, and easily separated. Nearer the base or surface of the water they are of a dark blue, and of a firmer texture. The waters are quite discoloured, owing to the nature of the bed