They found that the scarp over which the torrent poured extended for miles on each side. It appeared to be almost perpendicular, though away to the left it became more broken. On the right, except for one or two steep and rugged spurs, it was one continuous wall of rock.

The path they had followed round the western shore of the lake brought them to a small wooden bridge spanning an inflowing stream. It somewhat resembled the bridge delineated in the well-known willow pattern. To this the raft of timber was moored. Evidently it was part of the plan for maintaining the secrecy of the hill community that purchasers and vendors should come into contact as seldom as possible; or perhaps the woodcutters' own fear of the Eye kept them from approaching nearer to the dwelling of the "little men." No doubt the timber would presently be fetched, and drawn along the stream into the lake, and thence to its destination.

The three men looked around for some signs of human habitation, but discovered none. A rough roadway, however, led from the bridge along the base of the precipice towards the fall, which appeared to be about half a mile distant. After a brief consultation they decided to make their way along this road. To be prepared for possible danger they first laid down their impedimenta and unslung their rifles. Then they set off, Forrester leading with the shikari.

After a while the path rose somewhat steeply on the face of the cliff, and they soon saw that it passed underneath the fall itself, the torrent of water forming a gigantic arch. When they arrived beneath this they found themselves in a dim twilight, the glassy sea-green surface of the watery arch reflecting a pallid hue upon their faces. They were perfectly dry, except for some flecks of spray dashed upon them from the base of the fall. At this spot they were three or four hundred feet above the surface of the lake, which boiled and foamed like an angry sea immensely magnified. The din was terrific; even the loudest shout would scarcely have been audible.

At their first entrance into this segmental tunnel Hamid Gul shrank back, appalled by the noise, the falling water, and the immense, tattered sheet of spray that rose from the seething cauldron hundreds of feet below. But seeing that his employers were pressing forward he pulled himself together, and hurried on close at Mackenzie's heels. The width of the path had diminished to a bare three feet, and as the party crept along it they instinctively clung to the wall of rock on their left hand. A strange attraction was exercised by the smooth arch of falling water; on their right, inducing the same kind of vertigo which most people experience when looking down from giddy heights.

So they passed through the furlong of tunnel. A hundred yards or so beyond the eastern end the path began to slope downwards as steeply as it had ascended on the other side, and within a short space the party found themselves once more almost on a level with the lake. Then the path came to an abrupt end, disappearing into the water that washed the base of the perpendicular cliff. Here they halted; it seemed that they could go no farther, that they must retrace their steps and explore in the other direction.

They could not make themselves heard one by another, but Mackenzie signed to the rest to stand fast; he remembered that beyond the bridge behind them there was no road except that which skirted the lake, and drew the reasonable inference that the path by which they had come must, after all, lead somewhere. It occurred to him to test the depth of the water. Finding that it was no more than two feet, he took off his boots, rolled up his putties, and started to wade. In a few seconds he turned and beckoned to his companions. They followed his example, and on joining him found that he had come to a sharp corner of the precipice, which was cut at this point by an extraordinary rift. At the entrance it was perhaps forty feet wide. The sides were straighter and even nearer to the perpendicular than the face of the cliff bordering the lake. They gazed upwards in astonishment at the immense height. The top was so far above them that the sides seemed almost to touch, leaving only a narrow slit. Peering into the cleft, they saw nothing beyond the first hundred yards or so. Little light filtered through the opening at the top, and the floor of the rift was illuminated more and more faintly as the sides converged.

Our party stood there in mute amazement. Mackenzie was the only one of them who knew anything of geology: a Scot always knows something of everything; and he surmised that the rift was the result of some Titanic disruption of the earth in an age long past. It was as though the mass of solid rock had been rent asunder by a gigantic wedge, impelled by a Cyclopean hammer--such a hammer as Thor wields in the Norse myths.

It seemed of little use to enter the rift. No mortal men could make that their abode. But on passing beyond the entrance they soon found that further passage along the edge of the lake was impossible. The water still came right up to the face of the cliff, and the pathway--if it was a pathway--which they were treading sank ever deeper beneath the surface. There was nothing for it but to hark back, unless they were prepared to swim. Jackson suggested that possibly some side path branched from the rift, leading by a steep zigzag ascent to the summit of this strange precipice.

Retracing their steps accordingly, they turned into the rift, donned their boots, and marched forward. The floor sloped gently upwards, the walls converged until the space between them was barely half what it had been at the entrance. Pressing on, they became aware that the rift was not straight, as they had believed. A sharp bend brought them upon a sight that caused them to halt, peer nervously upward and in front, and tighten their grasp upon their rifles. Three canoes lay tandem against the right-hand side of the rift--harmless objects in themselves, but rather perturbing as indications that men were somewhere in the neighbourhood. They were obviously intended for transporting persons across the lake without the necessity of making the passage under the fall. In the dim light they would scarcely have been visible from the entrance, even had the rift been straight; the bend effectually concealed them.