To make sure of this, Bob got out the map and scrutinized it closely. Then, satisfied that he was right, he dashed forward, the Tuaregs at his heels.
The way now led up the side of a large hill. There was a break just to one side of the path, and the rescuers could look down to the foot of a deep gorge. Bob kept his dromedary as far away from the brink as possible, to do away with the grim possibility of the ground giving way from under his camel’s feet.
Finally, after trudging over a high plateau, they began climbing the base of the twin peaks. At first the ascent was very gradual, but in a short time the path curved upward around the side of the mountain.
“Getting there, all right,” observed Bob, as he noticed that they were now several hundred feet above the plateau.
At last they came to the top of a wide ledge, from which they could look out over scores of miles of rugged country. As the shelf began to narrow, Bob called a halt.
He took out the paper of native words and told the Tuaregs that they were now near the cave in which were his father and friends. It would only be necessary to round a corner before coming to its entrance.
But first he divided the group of natives into two sections. One, under the command of the chieftain, was to move on around the ledge to the cave from the west. The other, led by himself, would climb the steep side of the mountain and walk on above to the other side of the cavern. Then they would meet at the entrance and surround the Arabs and release the prisoners.
When Bob gave the word, the Tuaregs swung into action. Those in his group followed him up the cliff to the brink, while the men under the chieftain began moving around the ledge.
It was a dangerous climb up the steep side of the mountain, but at last Bob pulled himself up to another ledge about fifty feet above the lower one. Then he led the way several rods along its surface. When he thought they had passed beyond the entrance to the cave, he led the descent to the lower shelf.
A moment later he saw that he had miscalculated. He had not gone far enough beyond the cavern to escape the wary eyes of the Arabs who were stationed as guards.