“By Jove! Just look. Why, the crater itself is the exact shape of an eye!”
It was. Widening outward at the centre and terminating in an acute angle at each extremity, it was indeed a wonderful formation. Shaped like an eye-socket, and shut in on every side by precipitous rock walls, the gulf looked at first sight inaccessible. It seemed about half a mile in length, by four hundred yards at the widest point, and although this extraordinary hollow extended nearly the whole width of the mountain, dividing the flat table summit from the sheering ridge—yet there was no outlet at either end. Both stood gazing in amazement upon this marvellous freak of Nature.
“What did I tell you, old chap?” cried Sellon, triumphantly. “There’s more room on the top of this old berg than you’d think. Who’d have thought of finding a place like that up here? I believe it’s an extinct volcano, when all’s said and done.”
“Likely. Now let’s get to work.”
They descended the steep slope to the spot whence the arrow experiment had been made, and where Sellon had so narrowly escaped a grisly death. It was near the widest part of the rift. As they had expected, the cliff fell away in a sheer, unbroken wall at least two hundred feet. Nor did the opposite sides seem to offer any greater facility. Whichever way they looked, the rock fell sheer, or nearly so.
“We can do nothing here!” said Renshaw, surveying every point with a fairly powerful field-glass. “There are our chalk-marks all right—flags and all. We had better make a cast round to the right. According to Greenway’s story, the krantzes must be in a sort of terrace formation somewhere. That will be at the point where he was dodging the Bushmen.”
Skirting the edge of the gulf, they soon rounded the spur. It was even as Renshaw had conjectured. The ground became more broken. By dint of a not very difficult climb, they soon descended about a hundred feet. But here they were pulled up by a cliff—not sheer indeed, but apparently unnegotiable. It dropped a matter of thirty feet on to a grassy ledge some six yards wide, thence without a break about twice that depth to the bottom of the crater.
“We can negotiate that, I guess!” cried Renshaw, joyously, as he unwound a long coil of raw-hide rope. “I came prepared for a far greater drop, but we can do it well here. I don’t see any other place that seems more promising. And now I look at it, this must be the very point Greenway himself tried from. Look! That must be the identical rock he squatted under while the Bushmen were peppering him. Yes, by Jove, it must!” pointing to a great overhanging mass of stone which rose behind them. “Why, he had already found a diamond or two even here. What shan’t we find down yonder?”
There was a boyish light-heartedness about Renshaw now, even surpassing the spirits of his companion. The latter stared. But the consciousness of being within touch of fabulous wealth is a wonderful incentive to light-heartedness.
He measured off a length of the rope for the shorter drop. Then they drove in a crowbar, and, securing the rope, a very few minutes sufficed to let themselves down to the grassy ledge.