"Do you think there is any chance of their attacking us to-night, down the slopes, as they did this morning?" Tom asked Mr Harvey. "None whatever," the latter replied, "as you will see in the morning. This valley does not resemble the last; the rocks rise almost perpendicularly on both sides, and it would not be possible for them to make their way down, even if they wanted to do so." With the first dawn of light the oxen were inspanned. Just as they were starting, one of the natives of Dick's party came up to Mr Harvey, and reported that the natives in large numbers were showing in the ravine, and the sharp crack of the rifles, which almost at the same moment broke out, confirmed his statement. "The defile must be held," Mr Harvey said, "until we are well in the next pass. When the last waggon has entered I will send back word, and they must then follow us and hold the entrance. Tom, you had better take four more of the armed natives to strengthen the rear-guard. Tell Dick to come on and join me. You had your fair share of labour yesterday, and your hands are cut about so, by lifting and heaving rocks, that you would be able to do little to-day. It is rather a good sign that the natives are pressing forward in such force on our rear, as it shows that they have no great faith in any attempt they may make to-day to repeat their rock-throwing experiment of yesterday." As before two natives were sent on ahead to examine the defile, and Mr Harvey moved on with the caravan until he reached the upper edge of the valley, which was scarcely half a mile long. Just as he did so the natives came hurriedly down the defile; they reported that a short distance up they had met with another obstacle, to the full as difficult as that which they had got the waggons over on the preceding day, and that, as they turned an angle in the defile, and came in sight of it, they were saluted by a shower of arrows, and saw a crowd of natives on the top of the barrier. They had thrown themselves down behind the boulders, and had obtained a good view of the natives and the obstacle. It was some forty feet farther up, and was formed by three or four great boulders jambed in together. On the other side small boulders and stones seemed to have been piled up by the torrent to the level of the rocks; but on the lower side it was almost perpendicular, and they questioned if a man could climb it,--certainly there was no passage for oxen. CHAPTER FIFTEEN. A MOUNTAIN-TORRENT. The news brought by the scouts was very serious. The continued fire in the rear showed that the enemy were making a serious attack in that quarter. But Mr Harvey feared that his fighting force there must be weakened greatly, to enable him to attack so formidable a position as that which the enemy occupied in front. Before arriving at any decision as to his best course, he halted the caravan, and went forward himself, with the two natives, to inspect the position which they had discovered.