Returning to the steep climb to the upper gallery, we scaled the wet and slippery rocks, and found ourselves on a shelf over the canyon. The shelf gave ingress to the gallery, which rose gently in a westerly direction, with frequent twists and turns, and then turned north. In 150 feet it divided. We scrambled on; but all the branches evidently approached the surface of the ground, becoming earthy, and we soon found it impossible to get any farther. This upper level, which for our purposes was of less interest than the lower, is incrusted with deposits throughout its length of 80 or 90 yards. There are stalagmite curtains and sheets of tufa on the walls, the older rocks on the floor are cemented together with a crust of polished stalagmite, and some of the boulders are covered with shining enamel. We found it best to use an Alpine rope in getting back to the lower level, the ledges underneath not being easy to find by candlelight. Outside the sun was shining brightly, and the light that streamed in at the cave mouth, through the ferns and flowers and grasses that encircled it, was stained a fairy-like green. Continuing our way through the gorge between the sharp Limestone knoll of Peak's Hill and the bulkier Middle Hill, we followed a stream that comes down from Rushup Edge, perforates the Limestone base of Peak's Hill, and comes out on the other side at a small cave. In three furlongs this stream is swallowed under a cliff some 20 feet high, the ingress at present being through a series of holes, where the water makes an intermittent roaring, almost like the throb of a hydraulic ram, as if a siphon were momentarily discharging. Older rifts are seen in the same line of cliffs, and can be penetrated for 30 feet, but are now deserted by the water save at flood-time. Farther on is a deep depression in the hillside, big enough to engulf a house. It is supposed locally to have been produced by the falling in of a cave roof, but it is more probably an independent swallet, one of a series, nearly all funnel-shaped and long out of working order, that lie along a higher level in the Limestone than those that occupy the line of demarcation from the shales. The biggest of them is Bull Pit, which we come to later. Next to the last pair of large openings into which streams are running, and which may be called the Peak's Hill Swallets, since their waters rise out of Peak's Hill, we come to a large irregular series of trough-shaped hollows converging on another swallet at this same geological border-line. The openings here are all little ones. But the next swallet has a cave above it, into which we entered. It does not go far, but it has two ascending branches that can be traced to two small depressions in the Limestone where tiny affluents have percolated and cut for themselves little tunnels in the rock. The next swallet beyond this has but a small opening, although the hollow cut out by its rivulets through the shales is hundreds of square yards in area.