“At one time the stream entered by this opening, but a natural dam has gradually been formed causing it to find a new opening at the spot where it is now shown disappearing on the map. About midway between the entrance of the creek and the old entrance, Deutschman has excavated a small natural opening to a size sufficiently large enough to admit an average person with comfort. A small passage joins with the underground way of the creek, and by following along its edge you eventually come to the point of vantage previously described. _En route_, several small chambers are passed, originally carved out of the rock in the form of potholes by the swirl and swish of the waters, but since much distorted in shape owing to disintegration of the cleavage planes. The spot is unique and wonderful, and the sensations it produces eerie in the extreme. It is well worthy of a visit. [Illustration: On the road 2 miles from Glacier—Ross Peak in distance.] Mill Bridge Series. “On making its exit at the eastern end of Gopher Bridge, Cougar creek pours down a narrow rock-cut for a distance of 350 feet, when it again disappears in a whirl of flying spray below the surface of the valley. It reappears, 300 feet farther on at the bottom of a deep gorge, having dropped 85 feet while underground. The interval between the exit and entrance has been named Mill bridge by the party previously mentioned, on account of the roar of the water as it rushes underground through the choked entrance, resembling the noise made by a big mill in full operation. “The rock-cut above referred to is narrow, about 8 to 10 feet wide, and of regular appearance. The upper half presents a series of cascades and falls, and the sides show curious small potholes that are in the process of erosion from the soft limestone. It has been named ‘The Flume,’ owing to its resemblance to a millrace. There are several openings at the point where the creek disappears, and its last spectacular leap as it vanishes underground is very striking. 70 feet farther east is a larger opening, at one time the point where the stream disappeared, but as the rush of water cut deeper in the rock channel it took advantage of a handy crack and gradually carved out for itself the opening where the full volume now descends.