"We are now coming," Mr Harvey said, "to the very worst part of our journey. The hills we have seen in front of us for the last two days have to be crossed. To-morrow we ascend the lower slopes, which are tolerably easy; but the next day we have to pass through a very wild gorge. The road, which is the bed of a stream, mounts rapidly; but the ravine is nearly ten miles in length. Once at its head we are near the highest point of the shoulder over which we have to cross, and the descent on the other side is comparatively easy. If I could avoid this spot, I would do so; but I know of no other road by which waggons could cross the range for a very long distance either way; this is the one always used by traders. In the wet season it is altogether impassable, for in some places the ravine narrows to fifteen yards, with perpendicular cliffs on either side, and at these points the river, when in flood, rushes down twenty or thirty feet deep. Even putting aside the danger of attack in going through it, I would gladly avoid it if I could, for the weather is breaking; we have already had some showers, and may get heavy thunderstorms and a tremendous downfall of rain any day." The next day the journey was an arduous one; the ground was rough and broken, and the valley up which the road lay was frequently thickly strewn with boulders, which showed the force with which the water in flood-time rushed down over what was now its empty bed. After a long day's work the caravan halted for the night at the spot where the valley narrowed to the ravine. "It has been a pretty hard day's work to-day!" Tom said. "It is nothing to to-morrow's, as you will see," Mr Harvey replied. "Traders consider this defile to be the very hardest passage anywhere in South Africa, and there are plenty of other bad bits too. In many cases you will see we shall have to unload the waggons, and it will be all that a double team can do to pull them up empty. Sometimes of course the defile is easier than at others; it depends much upon the action of the last floods. In some years rocks and boulders have been jammed so thickly in the narrow parts that the defile has been absolutely impassable; the following year, perhaps, the obstruction has been swept away, or to a certain extent levelled by the spaces between the rocks being filled up with small stones and sand. How it is this season, I do not know; up to the time we left I had heard of no trader having passed along this way. I have spoken of it as a day's journey, but it is only under the most favourable circumstances that it has ever been accomplished in that time, and sometimes traders have been three or four days in getting through."