Directly the caravan halted Blacking and Jumbo started to examine the defile; it was already growing dusk, and they were only able to get two miles up before it was so dark that they could make their way no further. They returned, saying that the first portion of the defile, which was usually one of the most difficult, was in a bad condition; that many enormous boulders were lying in the bottom; but that it appeared to be practicable, although in some places the waggons would have to be unloaded. At daybreak the oxen were inspanned, and in a quarter of an hour the leading waggon approached the entrance of the gorge; it seemed cut through a perpendicular cliff, 200 feet high, the gorge through which the river issued appearing a mere narrow crack rent by some convulsion of nature. "It would be a fearful place to be attacked in," Dick said, "and a few men with rocks up above could destroy us." "Yes," Mr Harvey said; "but you see up there?" Dick looked up, and on one side of the passage saw some tiny figures. "The three hunters and ten of our men with muskets are up there; they started three hours ago, as they would have to go, Jumbo said, five miles along the face of the cliff before they reached a point where they could make an ascent so as to gain the edge of the ravine. They will keep along parallel with us, and their fire would clear both sides; it is not usual to take any precaution of this sort, but after our attack of the other day, and the attitude of the chief and his people, we cannot be too cautious. After passing through the first three miles of the defile, the ravine widens into a valley a hundred yards wide; here they will come down and join us. There are two other ravines, similar to the first, to be passed through, but the country there is so wild and broken that it would be impossible for them to keep along on the heights, and I doubt whether even the natives could find a point from which to attack us." They had now fairly entered the ravine. For thirty or forty feet up the walls were smooth and polished by the action of the winter torrents; above, jagged rocks overhung the path, and at some points the cliffs nearly met overhead. Although it was now almost broad daylight, in the depths of this ravine the light was dim and obscure.