It was at this station that the terrible truth began to unveil itself.

The station-master, the same sleepy man with the colored spectacles and the red fez, told them that he had seen a boy about fourteen years old and a little girl eight years old with an elderly negress, and that they had ridden toward the desert. He was not quite sure whether they had eight or nine camels with them, but he had noticed that one of them was laden, as if going on a long journey, and that the two Bedouins also carried a great deal of baggage on their saddles, and he remembered that when he had looked at the caravan one of the camel-drivers, a Sudanese, told him that they were the children of Englishmen who had ridden to Wadi Rayan.

“Have these Englishmen returned?” asked Mr. Tarkowski.

“Yes. They returned yesterday with two wolves they had shot,” answered the station-master, “and I was very much surprised that they did not bring the children back with them. But I did not ask them the reason, for it was none of my business.”

With these words he returned to his work.

During this explanation Mr. Rawlison’s face turned as white as paper. Looking at his friend with a wild stare, he raised his hat, lifted his hand to his perspiring forehead, and staggered as if he were about to fall.

“Rawlison, be a man!” cried Mr. Tarkowski. “Our children have been kidnapped. They must be saved!”

“Nell! Nell!” repeated the unhappy Englishman. “Nell and Stasch! It is not Stasch’s fault! They have both been brought here by treachery and then carried off. Who knows why? Perhaps in hopes of a ransom. Chamis is certainly in the plot, and so are Idris and Gebhr.”

Now he remembered what Fatima had said, that both these Sudanese were of the Dangali tribe, to which the Mahdi belonged, and that Chadigi, the father of Chamis, was also of the same tribe. As he thought of this his heart nearly stopped beating, for now he knew that the children had not been carried off in the hopes of a ransom, but to be exchanged for Smain and his family.

“But what would the tribe of the evil-minded prophet do with them? It would be impossible for them to hide themselves in the desert or anywhere along the banks of the Nile, for in the desert they would all die of hunger and thirst, and on the bank of the Nile they would be sure to be discovered. So there was only one course for them to pursue, and that was to flee with the children to the Mahdi!”