"It may all work for good," said the doctor, "and there is no harm in making a friend; but it is of no use to try and foresee what will happen. A sick man's fancies are very evanescent. Go on as you have done all through. One thing is very evident: he is mending fast, and can be moved when his father returns." "If he ever does," said the professor drily. "The lives of these fighting men are rather precarious, and if we never see him again I shall not be surprised." Another week glided by, and the large tent was taken down by the Baggara guard and set up again in their own camp, for the last of the Hakim's patients had expressed a wish to join his fellows, though far from being in a condition to leave, so that the young chief was the only sufferer left, while he was now sufficiently recovered to watch what went on around. But for the most part his eyes were fixed upon the desert, his gaze bespeaking the expectation of his father's return, though he never suggested it in his brief conversations with the Sheikh--brief from their difficulty, the old Arab confessing his inability to understand much that was said. But if the young chief was watching in that expectation he fixed his eyes upon the distant horizon in vain. The clouds appeared every morning, to hang for hours in the east along the course of the far-off river, and then die away in the glowing sunshine, while to north and south and west there was the shimmering haze of heat playing above the sand, till Frank began to be in despair. CHAPTER TWENTY ONE. FOR A FRESH START. One evening after the young chief had lain watching the desert in vain he signed for the Sheikh to come to him, and in a stronger voice bade him fetch the leader of the men left on guard. The man came, and a conversation ensued, the result of which was that the Baggara went away to join his companions, with whom a long consultation was held, followed by certain unmistakable movements which brought the Sheikh to his friends. "They are going to march," he said. "Their tents are being struck, and everyone is preparing. I saw four men seeing to the water-skins; others are packing, and soon after midnight they will leave." "And what about the young chief? He is not fit to go, eh, doctor?" "Unless he is carried," was the reply. The Sheikh smiled. "They are preparing a camel for him so that he can share it with one of the wounded men--a litter such as they use for the women. They can almost lie, one on either side, Excellencies. I expect that they will say nothing, but that we shall wake in the morning and find that we are alone." The Sheikh had hardly spoken when the party saw the head of the Baggara guard approaching. As the man came within reach he signed to the Sheikh to join him, and his words were very few before he turned upon his heel and strode away. "What does this mean, Ibrahim?" said Frank. "Did he tell you that they are going?"