"It would be as well to find that out, Sidi. Do you give me two of your best mounted men and then ride straight on with the others. We will remain here till they approach, and then ride on for another eight or ten miles, still keeping them in sight. They will assuredly camp at the wells of Orab if they are making for the oasis. These are about twenty miles from the Nile, and they will go no further to-day, for it is as much again before they come to another well. When we have with certainty made out that they are making for the wells of Orab, we will follow you at full speed, but do not wait for us, and, save to give your horses a drink, do not draw rein till you reach your people and deliver your father's message. I don't suppose that I shall overtake you before you get there, but I shall not be long after you, and my report may decide him what he had best do."