In the Wombeyan Caves, near Taralga, in this colony (New South Wales), there is a similar phenomenon. The mountain in which the caves are formed dams, at right angles, a valley of considerable length. On the one side a creek flows into a hole underneath the "Wombeyan Church"--a name given to the principal entrance. This shallow hole is filled with large boulders and less bulky water-worn stones, through which the water instantly filters and disappears. The suction is perceptible if a hand or foot be placed in the basin. On the other side of the mountain the water, running at a considerable distance below the surface, can be seen through an orifice. Farther on, about three-quarters of a mile from the mountain side, the stream bubbles up like a fountain, and reminds the visitor of antique pictures representing the rush of water from rock-smitten Horeb. The most gigantic of underground river wonders are to be found in the Mammoth Cave of Kentucky, where the Echo River is navigable for three-quarters of a mile, where the Roaring River raises its liquid voice, where Lake Lethe soothes to forgetfulness, and where there is a veritable Styx with a nineteenth century Charon. But although everything about that cave is colossal, it cannot surpass Jenolan in its deep emotional effects, or in the admiration it evokes. Indeed, in these respects an American visitor, familiar with the Mammoth Cave, has given the palm to Jenolan. Having descended the 50-feet ladder, the foot of which is clamped to a bare rock, the excursionist watches the guide hopping gleefully down, with candles in one hand and paraphernalia in the other. He then peers into the darkness to find the river, and is led along a gradual slope of about ten feet, when he comes to its margin without recognising it, and would possibly soon be up to his knees in it if he were not warned by his cicerone. It is apparently motionless, as smooth as a mirror, and so clear that at first it is difficult to believe there is any water there at all. You see the sand and pebbles and rocks at the bottom, but do not perceive the fluid which covers them.