"Did the marabout appoint Toudja as the place to make the exchange, or was it you?" she asked, over Victoria's shoulder.

"The marabout," said Stephen. "I fell in with the idea because I'd already made objections to several, and I could see none to Toudja. It's a day's journey farther north than the Zaouïa, and I remembered the bordj being kept by two Frenchmen, who would be of use if——" He checked himself, not wishing to hint that it might be necessary to guard against treason. "If we had to stop for the night," he amended, "no doubt the bordj would be better kept than some others. And we shall have to stop, you know, because my friend, Caird, can't arrive from Touggourt with the boy till late, at best."

"Did—the marabout seem bent on making this bordj the rendezvous?" Saidee asked.

Stephen's eyes met hers in a quick, involuntary glance, then turned to the ruined tower. He saw it against the northern sky as they came from the south, and, blackened by the lightning, it accentuated the desolation of the dunes. In itself, it looked sinister as a broken gibbet. "If the marabout had a strong preference for the place, he didn't betray it," was the only answer he could make. "Have you a special reason for asking?"

"No," Saidee echoed. "No special reason."

But Stephen and Victoria both guessed what was in her mind. As they looked at the tower all three thought of the Arabs who formed their caravan. There were six, sent out from the Zaouïa to take back the little Mohammed. They belonged body and soul to the marabout. At the town of Oued Tolga, Stephen had added a third to his escort of two; but though they were good guides, brave, upstanding fellows, he knew they would turn from him if there were any question between Roumis and men of their own religion. If an accident had happened to the child on the way back from Touggourt, or if any other difficulty arose, in which their interest clashed with his, he would have nine Arabs against him. He and Caird, with the two Highlanders, if they came, would be alone, no matter how large might be Nevill's Arab escort. Stephen hardly knew why these thoughts pressed upon him suddenly, with new insistence, as he saw the tower rise dark against the sky, jagged as if it had been hacked with a huge, dull knife. He had known from the first what risks they ran. Nevill and he and Sabine had talked them all over, and decided that, on the whole, there was no great danger of treachery from the marabout, who stood to lose too much, to gain too little, by breaking faith. As for Maïeddine, he was ill with fever, so the sisters said, and Saidee and Victoria believed that he had been kept in ignorance of the marabout's bargain. Altogether, circumstances seemed to have combined in their favour. Ben Halim's wife was naturally suspicious and fearful, after her long martyrdom, but there was no new reason for uneasiness. Only, Stephen reminded himself, he must not neglect the slightest wavering of the weather-vane. And in every shadow he must look for a sign.

They had not made a hurried march from the desert city, for Stephen and Sabine had calculated the hour at which Nevill might have received the summons, and the time he would take on the return journey. It was possible, Lady MacGregor being what she was, that she might have rewired the telegram to a certain bordj, the only telegraph station between Touggourt and Oued Tolga. If she had done this, and the message had caught Nevill, many hours would be saved. Instead of getting to the bordj about midnight, tired out with a long, quick march, he might be expected before dark. Even so, Stephen would be well ahead, for, as the caravan came to the gate of the bordj, it was only six o'clock, blazing afternoon still, and hot as midday, with the fierce, golden heat of the desert towards the end of May.

The big iron gates were wide open, and nothing stirred in the quadrangle inside; but as Stephen rode in, one of the Frenchmen he remembered slouched out of a room where the wooden shutters of the window were closed for coolness. His face was red, and he yawned as he came forward, rubbing his eyes as if he had been asleep. But he welcomed Stephen politely, and seeing that a good profit might be expected from so large a party, he roused himself to look pleased.

"I must have a room for two ladies," said Stephen, "and I am expecting a friend with a small caravan, to arrive from the north. However, six of my Arabs will go back when he comes. You must do the best you can for us, but nothing is of any importance compared to the ladies' comfort."

"Certainly, I will do my best," the keeper of the bordj assured him. "But as you see, our accommodation is humble. It is strained when we have four or five officers for the night, and though I and my brother have been in this God-forsaken place—worse luck!—for nine years, we have never yet had to put up ladies. Unfortunately, too, my brother is away, gone to Touggourt to buy stores, and I have only one Arab to help me. Still, though I have forgotten many useful things in this banishment, I have not forgotten how to cook, as more than one French officer could tell you."