"There must surely be many points higher up where this can be done."
"Yes, señor, if we could get to them. But you saw we had difficulty in making our way through this gorge; there may be others higher up where it would be impossible either for us or the animals to pass."
"I did not think of that. Yes, that must be so. Well, you had certainly better go at once. My brother will relieve José, and after the boy has breakfasted he can return to his post, and Bertie can join me. I think if I see the savages trying to find a path I will open fire upon them. I don't say I should be able to hit them, for the top of those hills must be eight or nine hundred yards' range, and it is not easy to hit an object very much above or very much below you; but it is important that they should know that our weapons carry as far as that; when they hear bullets strike close to them they will hesitate about coming lower down, and unless they do come within two or three hundred feet from the bottom they cannot be sure of getting down."
Dias nodded. "That is a very good idea. Another cause of delay will be that those at the top cannot see far down the rock on their own side, so they will have to start by guess-work. Each party must fix upon the easiest places on the opposite side, and then go back again and change sides. I don't suppose they know any more of this place than we do. They always keep down in the plains, and it is only because they met us down there that they have followed us so far. I believe they will follow on as long as they think there is a chance of destroying us, for they are so jealous of any white man coming into what they regard as their country that they would spare no pains to kill anyone who ventured there. Now I will go, señor. You will keep near this end of the valley, in case there should be an alarm that they are coming up the stream."
"Certainly; and my brother shall remain with José. With his rifle and the two double-barrelled guns and José's musket they could hold the ravine against anything but a rush of the whole tribe."
An hour later Harry saw a number of figures appear against the sky-line on both sides. As they were clustered together, and would afford a far better mark than a single Indian, he took a steady aim at the party on the southern hill and fired. He had aimed above rather than below them, as, had the ball struck much below, they might not hear it, whereas, if it went over their heads, they would certainly do so. A couple of seconds after firing he saw a sudden movement among the savages, and a moment later not one was to be seen. Donna Maria, who was standing close by him watching them, clapped her hands. "Your ball must have gone close to them," she said, "but I don't think you hit anyone."
"I did not try to do so," he said. "I wanted the ball to go just over their heads, so that they should know that even at that distance they were not safe. I have no doubt that astonishment as much as fear made them bolt. They'll be very careful how far they come down the side of the hill after that. Now for the fellows on the other side."
But these too had disappeared, having evidently noticed the effect produced upon the others. After a pause heads appeared here and there at the edge of the crests. Evidently the lesson had impressed them with the necessity for precaution, as they no longer kept together, and they had apparently crawled up to continue their investigations. Beyond keeping a watch to see that none had attempted to descend the slope Harry did not interfere with them. At times he strolled to the breast-work, but no movement had been seen in that direction. In two hours Dias returned.
"The gorge above is a quarter of a mile through, and very difficult to pass. It is half-blocked with great rocks in two or three places, and there would be immense difficulty in getting the mules over. Beyond that it widens again, but the extent is not more than half what it is here. The walls are almost perpendicular, and I do not think that it would be possible to climb them at any point. Farther up there is another ravine. It is very narrow—not half so wide as this—and the stream rushes with great velocity along it. Two hundred yards from the entrance the rocks close in completely, and there is a fall of water sixty or seventy feet high."
"Well, that settles the point, Dias. We cannot get the animals out except by the way they came in. As for ourselves, we might climb up at some point in this ravine, but not in the others."